[ltp] USB issues after suspend to RAM with recent kernels on T60

[Jan Kundrát]

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Henrique de Moraes Holschuh wrote:
> Looks like USB autosuspend getting enabled on buggy hardware that can't=
 deal
> with it (your mouse).
>=20
> The real problem might be something else, and it could be a kernel bug,=
 but
> it DOES look like USB autosuspend getting enabled and killing your mous=
e.


I tried to do my homework [1] and this is what I've found:

velbloud ~ # lsusb
Bus 004 Device 003: ID 0483:2016 SGS Thomson Microelectronics
Fingerprint Reader
Bus 004 Device 001: ID 1d6b:0001
Bus 002 Device 001: ID 1d6b:0001
Bus 005 Device 015: ID 046d:c30e Logitech, Inc.
Bus 005 Device 014: ID 0458:003a KYE Systems Corp. (Mouse Systems)
Bus 005 Device 011: ID 04b3:4485 IBM Corp.
Bus 005 Device 001: ID 1d6b:0002
Bus 001 Device 001: ID 1d6b:0001
Bus 003 Device 001: ID 1d6b:0001

Seems like I'm looking for "14" in the devnum. The only
/sys/bus/usb/devices/*/devnum with "14" in it is
/sys/bus/usb/devices/5-6.4/devnum, and when checking its autosuspend
settings, I get this:

velbloud ~ # cat /sys/bus/usb/devices/5-6.4/power/level
on

Which, according to [1], means that autosuspend is disabled. Is that
correct? Any other paths to pursue?

Cheers,
-jkt

[1] /usr/src/linux/Documentation/usb/power-management.txt


--=20
cd /local/pub && more beer > /dev/mouth


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