Skip to content

Instantly share code, notes, and snippets.

@jwarchol

jwarchol/README.md

Created February 21, 2015 14:17
Show Gist options
  • Save jwarchol/c6cb2cc74be11229e5e6 to your computer and use it in GitHub Desktop.
Save jwarchol/c6cb2cc74be11229e5e6 to your computer and use it in GitHub Desktop.
Download ZIP

Revisions

  1. jwarchol created this gist Feb 21, 2015.
    16 changes: 16 additions & 0 deletions README.md
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,16 @@
    When trying to use pktriggercord with a Pentax K-r I was unable to get it mounting via USB. I'd get lines like this over and over in /var/log/syslog:

    ````
    Feb 21 14:11:12 raspberrypi kernel: [ 996.673083] usb 1-1.2: new high-speed USB device number 49 using dwc_otg
    Feb 21 14:11:13 raspberrypi kernel: [ 996.933126] usb 1-1.2: new high-speed USB device number 50 using dwc_otg
    Feb 21 14:11:13 raspberrypi kernel: [ 997.193121] usb 1-1.2: new high-speed USB device number 51 using dwc_otg
    ````

    When looking at other USB problems people had documented solutions for with the Pi I found that turning the USB down from hi-speed to full-speed helped in some cases. To do that edit /boot/cmdline.txt and add this to the end and reboot

    ````
    dwc_otg.speed=1
    ````

    That worked for me.