Re: Beaglebone usb issue after first reboot

[Denys Dmytriyenko <denys@ti.com>]

On Wed, May 14, 2014 at 12:38:10PM +0100, Mark O'Donovan wrote:
> Issue:
> Beaglebone black detects usb devices on first boot after flashing sd-card.
> On subsequent boots it does not.
> 
> Setup:
> Yocto Project 1.5.1
> linux-ti-staging 3.12.17
> meta-ti = "dora:990d8f62257029e25fc2b8786155bcf5dc483659"
> 
> Using the diff command found here:
> http://superuser.com/a/470876
> 
> I found the following:
> diff -r CLEAN-IMAGE/etc/udev/cache.data BOOTED-IMAGE/etc/udev/cache.data
> 0a1
> > Linux version 3.12.17 (modonovan@changanu) (gcc version 4.8.1 (GCC) ) #3
> SMP PREEMPT Thu May 1 14:08:42 IST 2014console=ttyO0,115200n8
> root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwaitCharacter devices:1 mem4
> /dev/vc/04 tty4 ttyS5 /dev/tty5 /dev/console5 /dev/ptmx7 vcs10 misc13
> input29 fb81 video4linux89 i2c90 mtd128 ptm136 pts180 usb188 ttyUSB189
> usb_device247 ttySDIO248 usbmon249 ttyO250 watchdog251 ptp252 pps253
> media254 rtcBlock devices:1 ramdisk259 blkext7 loop8 sd31 mtdblock65 sd66
> sd67 sd68 sd69 sd70 sd71 sd128 sd129 sd130 sd131 sd132 sd133 sd134 sd135
> sd179 mmc
> 
> 
> Running the following after booting fixes the issue on the next boot:
> echo "" > /etc/udev/cache.data
> 
> Is this a known issue??

Mark,

Thanks for the report! Yes, I've seen this issue before and had a workaround 
for it, but I didn't trace it to the udev cache. I'll check it again.

-- 
Denys