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How can I power cycle a USB device on Raspberry Pi?


Windows 7 Professional 32 bit USB hub/port power settingsIncrease power going to USB deviceSetting up WiFi in Ubuntu Server 12.04Cannot make mobile broadband Vodafone USB connection Ubuntu 13.04USB Suspend: USB Device not Entering Selective SuspendUSB hubs that actually implements Hub Port Power Control?Plugging a Kinect 2 in results in cycling error “USB device not recognized”Shouldn't my Belkin USB hub be able to power on a USB MIDI keyboard?Why do USB devices need enumeration if they can be uniquely identified by bus and hub port?What is the performance penalty of chaining USB hubs?













7















My Netgear WiFi stick (using the ath9k_htc driver) on my Raspberry Pi periodically gets into a bad state that results in USB read errors in dmesg. This state cannot be corrected by a system reset, but requires a full power cycle of the USB device, either by unplugging it and plugging the USB stick back in, or power cycling the whole computer.



I have read that it is possible to programmatically cycle power to a USB device using a USB hub. So I have tried this with my inland 4 Port USB 2.0 Hub based on the information in this posting:



https://stackoverflow.com/questions/1163824/linux-usb-turning-the-power-on-and-off



But the lights on the USB WiFi stick stay glowing even after issuing the command below, although it does make the wlan0 device disappear. I tried it on a Belkin 4-Port Hub with the same results. Anybody have any ideas?



echo '1-1.2.3' | tee /sys/bus/usb/drivers/usb/unbind


Details of my usb connections:



pi@fpi-16 ~ $ sudo lsusb -t
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
|__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/3p, 480M
|__ Port 1: Dev 3, If 0, Class=vend., Driver=smsc95xx, 480M
|__ Port 2: Dev 4, If 0, Class=hub, Driver=hub/4p, 480M
|__ Port 1: Dev 5, If 0, Class=vend., Driver=rt2800usb, 480M
|__ Port 3: Dev 6, If 0, Class=vend., Driver=ath9k_htc, 480M









share|improve this question





























    7















    My Netgear WiFi stick (using the ath9k_htc driver) on my Raspberry Pi periodically gets into a bad state that results in USB read errors in dmesg. This state cannot be corrected by a system reset, but requires a full power cycle of the USB device, either by unplugging it and plugging the USB stick back in, or power cycling the whole computer.



    I have read that it is possible to programmatically cycle power to a USB device using a USB hub. So I have tried this with my inland 4 Port USB 2.0 Hub based on the information in this posting:



    https://stackoverflow.com/questions/1163824/linux-usb-turning-the-power-on-and-off



    But the lights on the USB WiFi stick stay glowing even after issuing the command below, although it does make the wlan0 device disappear. I tried it on a Belkin 4-Port Hub with the same results. Anybody have any ideas?



    echo '1-1.2.3' | tee /sys/bus/usb/drivers/usb/unbind


    Details of my usb connections:



    pi@fpi-16 ~ $ sudo lsusb -t
    /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
    |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/3p, 480M
    |__ Port 1: Dev 3, If 0, Class=vend., Driver=smsc95xx, 480M
    |__ Port 2: Dev 4, If 0, Class=hub, Driver=hub/4p, 480M
    |__ Port 1: Dev 5, If 0, Class=vend., Driver=rt2800usb, 480M
    |__ Port 3: Dev 6, If 0, Class=vend., Driver=ath9k_htc, 480M









    share|improve this question



























      7












      7








      7


      2






      My Netgear WiFi stick (using the ath9k_htc driver) on my Raspberry Pi periodically gets into a bad state that results in USB read errors in dmesg. This state cannot be corrected by a system reset, but requires a full power cycle of the USB device, either by unplugging it and plugging the USB stick back in, or power cycling the whole computer.



      I have read that it is possible to programmatically cycle power to a USB device using a USB hub. So I have tried this with my inland 4 Port USB 2.0 Hub based on the information in this posting:



      https://stackoverflow.com/questions/1163824/linux-usb-turning-the-power-on-and-off



      But the lights on the USB WiFi stick stay glowing even after issuing the command below, although it does make the wlan0 device disappear. I tried it on a Belkin 4-Port Hub with the same results. Anybody have any ideas?



      echo '1-1.2.3' | tee /sys/bus/usb/drivers/usb/unbind


      Details of my usb connections:



      pi@fpi-16 ~ $ sudo lsusb -t
      /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
      |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/3p, 480M
      |__ Port 1: Dev 3, If 0, Class=vend., Driver=smsc95xx, 480M
      |__ Port 2: Dev 4, If 0, Class=hub, Driver=hub/4p, 480M
      |__ Port 1: Dev 5, If 0, Class=vend., Driver=rt2800usb, 480M
      |__ Port 3: Dev 6, If 0, Class=vend., Driver=ath9k_htc, 480M









      share|improve this question
















      My Netgear WiFi stick (using the ath9k_htc driver) on my Raspberry Pi periodically gets into a bad state that results in USB read errors in dmesg. This state cannot be corrected by a system reset, but requires a full power cycle of the USB device, either by unplugging it and plugging the USB stick back in, or power cycling the whole computer.



      I have read that it is possible to programmatically cycle power to a USB device using a USB hub. So I have tried this with my inland 4 Port USB 2.0 Hub based on the information in this posting:



      https://stackoverflow.com/questions/1163824/linux-usb-turning-the-power-on-and-off



      But the lights on the USB WiFi stick stay glowing even after issuing the command below, although it does make the wlan0 device disappear. I tried it on a Belkin 4-Port Hub with the same results. Anybody have any ideas?



      echo '1-1.2.3' | tee /sys/bus/usb/drivers/usb/unbind


      Details of my usb connections:



      pi@fpi-16 ~ $ sudo lsusb -t
      /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc_otg/1p, 480M
      |__ Port 1: Dev 2, If 0, Class=hub, Driver=hub/3p, 480M
      |__ Port 1: Dev 3, If 0, Class=vend., Driver=smsc95xx, 480M
      |__ Port 2: Dev 4, If 0, Class=hub, Driver=hub/4p, 480M
      |__ Port 1: Dev 5, If 0, Class=vend., Driver=rt2800usb, 480M
      |__ Port 3: Dev 6, If 0, Class=vend., Driver=ath9k_htc, 480M






      linux usb






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited May 23 '17 at 12:41









      Community

      1




      1










      asked Dec 26 '12 at 15:11









      David YoungDavid Young

      7424




      7424






















          3 Answers
          3






          active

          oldest

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          1














          If your USB host driver is compiled as a kernel module you can try to unload it and reload it. This should usually also power off totally the USB (I did it on other devices with faulty USB hardware that need to be electrically reset, not specifically on the Rasperry Pi which I don't have sorry).
          So check if you see it as a module (lsmod) or compile it as a module and later on rmmod it (and all the dependencies eventually) and reload it again, it should do the trick.






          share|improve this answer































            0














            Here is an app that can do just what you need: https://github.com/codazoda/hub-ctrl.c



            For installation and usage instructions see README.md.



            It may take some trial and error to figure out which hub and port does correspond to each USB port, which seems to vary depending on the Raspberry Pi model.



            Power cycling can be achieved in a single command by sending a p 0 command (power off) followed by a p 1 (power on).






            share|improve this answer

































              0














              Prerequisite:
              Download and compile usbreset from https://gist.github.com/x2q/5124616
              Compile with gcc -o usbreset usbreset.c . GCC should be already on your raspberry pi.
              Then chmod +x usbreset



              If you have only one usb device, you can reset that device and will work.
              If you have many usb devices, you should reset the usb hub instead.



              To find the ids of usb devices run lsusb.
              You should see something like:
              Bus 001 Device 009: ID 152d:0578 JMicron Technology Corp. / JMicron USA Technology Corp.
              Bus 001 Device 008: ID 1f75:0621 Innostor Technology Corporation
              Bus 001 Device 007: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
              Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
              Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



              The hub I am writing about is SMC9514 Hub.



              Create a sh file:



              #!/bin/bash

              USBNAME=0424:9514 #Put here the usb ID
              LSUSB=$(lsusb | grep --ignore-case $USBNAME)
              FOLD="/dev/bus/usb/"$(echo $LSUSB | cut --delimiter=' ' --fields='2')"/"$(echo $LSUSB | cut --delimiter=' ' --fields='4' | tr --delete ":")
              echo $LSUSB
              echo $FOLD

              sudo ./usbreset $FOLD; #The path where you have the usbreset executable


              And run it ar boot: bash usbreset.sh



              You must bash usbreset.sh before mounting any usb device that already works.
              My Pi, for eaxample, has one permanent attached SSD and two HDD powered by a relay board. I must run the reset command before mounting the SSD, otherwise it will not work.



              It should work for your device too.



              Hope it helps.





              share








              New contributor




              IonutG is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
              Check out our Code of Conduct.




















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                1














                If your USB host driver is compiled as a kernel module you can try to unload it and reload it. This should usually also power off totally the USB (I did it on other devices with faulty USB hardware that need to be electrically reset, not specifically on the Rasperry Pi which I don't have sorry).
                So check if you see it as a module (lsmod) or compile it as a module and later on rmmod it (and all the dependencies eventually) and reload it again, it should do the trick.






                share|improve this answer




























                  1














                  If your USB host driver is compiled as a kernel module you can try to unload it and reload it. This should usually also power off totally the USB (I did it on other devices with faulty USB hardware that need to be electrically reset, not specifically on the Rasperry Pi which I don't have sorry).
                  So check if you see it as a module (lsmod) or compile it as a module and later on rmmod it (and all the dependencies eventually) and reload it again, it should do the trick.






                  share|improve this answer


























                    1












                    1








                    1







                    If your USB host driver is compiled as a kernel module you can try to unload it and reload it. This should usually also power off totally the USB (I did it on other devices with faulty USB hardware that need to be electrically reset, not specifically on the Rasperry Pi which I don't have sorry).
                    So check if you see it as a module (lsmod) or compile it as a module and later on rmmod it (and all the dependencies eventually) and reload it again, it should do the trick.






                    share|improve this answer













                    If your USB host driver is compiled as a kernel module you can try to unload it and reload it. This should usually also power off totally the USB (I did it on other devices with faulty USB hardware that need to be electrically reset, not specifically on the Rasperry Pi which I don't have sorry).
                    So check if you see it as a module (lsmod) or compile it as a module and later on rmmod it (and all the dependencies eventually) and reload it again, it should do the trick.







                    share|improve this answer












                    share|improve this answer



                    share|improve this answer










                    answered Dec 4 '13 at 15:38









                    fede.evolfede.evol

                    1,662175




                    1,662175

























                        0














                        Here is an app that can do just what you need: https://github.com/codazoda/hub-ctrl.c



                        For installation and usage instructions see README.md.



                        It may take some trial and error to figure out which hub and port does correspond to each USB port, which seems to vary depending on the Raspberry Pi model.



                        Power cycling can be achieved in a single command by sending a p 0 command (power off) followed by a p 1 (power on).






                        share|improve this answer






























                          0














                          Here is an app that can do just what you need: https://github.com/codazoda/hub-ctrl.c



                          For installation and usage instructions see README.md.



                          It may take some trial and error to figure out which hub and port does correspond to each USB port, which seems to vary depending on the Raspberry Pi model.



                          Power cycling can be achieved in a single command by sending a p 0 command (power off) followed by a p 1 (power on).






                          share|improve this answer




























                            0












                            0








                            0







                            Here is an app that can do just what you need: https://github.com/codazoda/hub-ctrl.c



                            For installation and usage instructions see README.md.



                            It may take some trial and error to figure out which hub and port does correspond to each USB port, which seems to vary depending on the Raspberry Pi model.



                            Power cycling can be achieved in a single command by sending a p 0 command (power off) followed by a p 1 (power on).






                            share|improve this answer















                            Here is an app that can do just what you need: https://github.com/codazoda/hub-ctrl.c



                            For installation and usage instructions see README.md.



                            It may take some trial and error to figure out which hub and port does correspond to each USB port, which seems to vary depending on the Raspberry Pi model.



                            Power cycling can be achieved in a single command by sending a p 0 command (power off) followed by a p 1 (power on).







                            share|improve this answer














                            share|improve this answer



                            share|improve this answer








                            edited Jun 21 '18 at 22:09

























                            answered Jun 21 '18 at 22:03









                            molgarmolgar

                            1,521912




                            1,521912























                                0














                                Prerequisite:
                                Download and compile usbreset from https://gist.github.com/x2q/5124616
                                Compile with gcc -o usbreset usbreset.c . GCC should be already on your raspberry pi.
                                Then chmod +x usbreset



                                If you have only one usb device, you can reset that device and will work.
                                If you have many usb devices, you should reset the usb hub instead.



                                To find the ids of usb devices run lsusb.
                                You should see something like:
                                Bus 001 Device 009: ID 152d:0578 JMicron Technology Corp. / JMicron USA Technology Corp.
                                Bus 001 Device 008: ID 1f75:0621 Innostor Technology Corporation
                                Bus 001 Device 007: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
                                Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
                                Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



                                The hub I am writing about is SMC9514 Hub.



                                Create a sh file:



                                #!/bin/bash

                                USBNAME=0424:9514 #Put here the usb ID
                                LSUSB=$(lsusb | grep --ignore-case $USBNAME)
                                FOLD="/dev/bus/usb/"$(echo $LSUSB | cut --delimiter=' ' --fields='2')"/"$(echo $LSUSB | cut --delimiter=' ' --fields='4' | tr --delete ":")
                                echo $LSUSB
                                echo $FOLD

                                sudo ./usbreset $FOLD; #The path where you have the usbreset executable


                                And run it ar boot: bash usbreset.sh



                                You must bash usbreset.sh before mounting any usb device that already works.
                                My Pi, for eaxample, has one permanent attached SSD and two HDD powered by a relay board. I must run the reset command before mounting the SSD, otherwise it will not work.



                                It should work for your device too.



                                Hope it helps.





                                share








                                New contributor




                                IonutG is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                                Check out our Code of Conduct.

























                                  0














                                  Prerequisite:
                                  Download and compile usbreset from https://gist.github.com/x2q/5124616
                                  Compile with gcc -o usbreset usbreset.c . GCC should be already on your raspberry pi.
                                  Then chmod +x usbreset



                                  If you have only one usb device, you can reset that device and will work.
                                  If you have many usb devices, you should reset the usb hub instead.



                                  To find the ids of usb devices run lsusb.
                                  You should see something like:
                                  Bus 001 Device 009: ID 152d:0578 JMicron Technology Corp. / JMicron USA Technology Corp.
                                  Bus 001 Device 008: ID 1f75:0621 Innostor Technology Corporation
                                  Bus 001 Device 007: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
                                  Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
                                  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



                                  The hub I am writing about is SMC9514 Hub.



                                  Create a sh file:



                                  #!/bin/bash

                                  USBNAME=0424:9514 #Put here the usb ID
                                  LSUSB=$(lsusb | grep --ignore-case $USBNAME)
                                  FOLD="/dev/bus/usb/"$(echo $LSUSB | cut --delimiter=' ' --fields='2')"/"$(echo $LSUSB | cut --delimiter=' ' --fields='4' | tr --delete ":")
                                  echo $LSUSB
                                  echo $FOLD

                                  sudo ./usbreset $FOLD; #The path where you have the usbreset executable


                                  And run it ar boot: bash usbreset.sh



                                  You must bash usbreset.sh before mounting any usb device that already works.
                                  My Pi, for eaxample, has one permanent attached SSD and two HDD powered by a relay board. I must run the reset command before mounting the SSD, otherwise it will not work.



                                  It should work for your device too.



                                  Hope it helps.





                                  share








                                  New contributor




                                  IonutG is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                                  Check out our Code of Conduct.























                                    0












                                    0








                                    0







                                    Prerequisite:
                                    Download and compile usbreset from https://gist.github.com/x2q/5124616
                                    Compile with gcc -o usbreset usbreset.c . GCC should be already on your raspberry pi.
                                    Then chmod +x usbreset



                                    If you have only one usb device, you can reset that device and will work.
                                    If you have many usb devices, you should reset the usb hub instead.



                                    To find the ids of usb devices run lsusb.
                                    You should see something like:
                                    Bus 001 Device 009: ID 152d:0578 JMicron Technology Corp. / JMicron USA Technology Corp.
                                    Bus 001 Device 008: ID 1f75:0621 Innostor Technology Corporation
                                    Bus 001 Device 007: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
                                    Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
                                    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



                                    The hub I am writing about is SMC9514 Hub.



                                    Create a sh file:



                                    #!/bin/bash

                                    USBNAME=0424:9514 #Put here the usb ID
                                    LSUSB=$(lsusb | grep --ignore-case $USBNAME)
                                    FOLD="/dev/bus/usb/"$(echo $LSUSB | cut --delimiter=' ' --fields='2')"/"$(echo $LSUSB | cut --delimiter=' ' --fields='4' | tr --delete ":")
                                    echo $LSUSB
                                    echo $FOLD

                                    sudo ./usbreset $FOLD; #The path where you have the usbreset executable


                                    And run it ar boot: bash usbreset.sh



                                    You must bash usbreset.sh before mounting any usb device that already works.
                                    My Pi, for eaxample, has one permanent attached SSD and two HDD powered by a relay board. I must run the reset command before mounting the SSD, otherwise it will not work.



                                    It should work for your device too.



                                    Hope it helps.





                                    share








                                    New contributor




                                    IonutG is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                                    Check out our Code of Conduct.










                                    Prerequisite:
                                    Download and compile usbreset from https://gist.github.com/x2q/5124616
                                    Compile with gcc -o usbreset usbreset.c . GCC should be already on your raspberry pi.
                                    Then chmod +x usbreset



                                    If you have only one usb device, you can reset that device and will work.
                                    If you have many usb devices, you should reset the usb hub instead.



                                    To find the ids of usb devices run lsusb.
                                    You should see something like:
                                    Bus 001 Device 009: ID 152d:0578 JMicron Technology Corp. / JMicron USA Technology Corp.
                                    Bus 001 Device 008: ID 1f75:0621 Innostor Technology Corporation
                                    Bus 001 Device 007: ID 0424:ec00 Standard Microsystems Corp. SMSC9512/9514 Fast Ethernet Adapter
                                    Bus 001 Device 002: ID 0424:9514 Standard Microsystems Corp. SMC9514 Hub
                                    Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub



                                    The hub I am writing about is SMC9514 Hub.



                                    Create a sh file:



                                    #!/bin/bash

                                    USBNAME=0424:9514 #Put here the usb ID
                                    LSUSB=$(lsusb | grep --ignore-case $USBNAME)
                                    FOLD="/dev/bus/usb/"$(echo $LSUSB | cut --delimiter=' ' --fields='2')"/"$(echo $LSUSB | cut --delimiter=' ' --fields='4' | tr --delete ":")
                                    echo $LSUSB
                                    echo $FOLD

                                    sudo ./usbreset $FOLD; #The path where you have the usbreset executable


                                    And run it ar boot: bash usbreset.sh



                                    You must bash usbreset.sh before mounting any usb device that already works.
                                    My Pi, for eaxample, has one permanent attached SSD and two HDD powered by a relay board. I must run the reset command before mounting the SSD, otherwise it will not work.



                                    It should work for your device too.



                                    Hope it helps.






                                    share








                                    New contributor




                                    IonutG is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                                    Check out our Code of Conduct.








                                    share


                                    share






                                    New contributor




                                    IonutG is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                                    Check out our Code of Conduct.









                                    answered 7 mins ago









                                    IonutGIonutG

                                    11




                                    11




                                    New contributor




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                                    Check out our Code of Conduct.





                                    New contributor





                                    IonutG is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                                    Check out our Code of Conduct.






                                    IonutG is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                                    Check out our Code of Conduct.






























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                                        Why not use the yoke to control yaw, as well as pitch and roll? Announcing the arrival of...