After a couple of weeks on the vanilla 3.12.0-031200rc7-generic, the
problem has not shown itself.
** Tags added: kernel-fixed-upstream-3.12.0-031200rc7-generic
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* manually adding every USB device to /etc/sysfs.conf
* adding usbcore.autosuspend = -1 to the kernel's boot arguments
* disabling /usr/lib/pm-utils/usb_bluetooth
...all do not help.
I'm fairly lost.
** Tags added: saucy
** Changed in: linux (Ubuntu)
Status: Incomplete = New
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You
The steps in the previous comment didn't work either. It seems that
autosuspend still occurs for individual devices even when usbcore is
told not to do it. I don't know enough about the internals of the Linux
kernel to know if this is intended behaviour.
I've tried manually adding every USB
Clarification: the kernel I am patching is from the Ubuntu kernel team's
git repository, not a 'vanilla' kernel.
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https://bugs.launchpad.net/bugs/1072234
Title:
050d:0017
I'm still investigating this bug. The situation at present is:
* Bug still present in Saucy's stock 3.11.0-13 kernel.
* Appears to be related to USB powersaving.
* Installing sysfsutils and adding the line
bus/usb/devices/*/power/autosuspend -1 to /etc/sysfs.conf *appears* to be a
workaround.
And a correction: sysfsutils doesn't actually support globbing; I pieced
together this suggestion from several solutions, no wonder it didn't
work... The correct version of this workaround is to do something such
as this:
james@rainbowphoenix:~$ ls -1 /sys/bus/usb/devices/*/power/autosuspend
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