Hi!
I encountered that my system freezes when resuming my Lenovo X220t with
integrated Wacom ISDv4 tablet from S3 suspend.
Currently running 3.17.0-rc6, I started to bisect and found that this
commit causes the issue:
commit 29b4739134c73a2873adec93346f09bb76d6a794
Author: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
Date: Thu Jul 24 12:52:23 2014 -0700
Input: wacom - switch from an USB driver to a HID driver
Running 3.17.0-rc6, right after boot, this shows up in the log:
[ 25.843484] wacom 0003:056A:00E6.0001: usb_submit_urb(ctrl) failed: -1
[ 25.843531] wacom 0003:056A:00E6.0001: timeout initializing reports
[ 25.843886] wacom 0003:056A:00E6.0001: hidraw0: USB HID v1.11 Device
[Tablet ISD-V4] on usb-0000:00:1d.0-1.5/input0
[ 25.846036] input: Wacom ISDv4 E6 Finger as
/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.1/0003:056A:00E6.0002/input/input18
When suspending, the screen goes off and about 8 seconds later, the
machine actually suspends.
Right after the (instant) resume, I can see the frame buffer I had when
suspending (X screen) for about 10 seconds. During that time, no sysrq
works. After this short period, the tty1-framebuffer appears, with
messed up linebreaks (no carriage returns occur any more), and the
capslock-led starts blinking. Sysrq keys still don't work. The system is
completely frozen.
Running the kernel from the bisected first good commit, the suspend is
faster (under 1 second) and the resume does not crash.
I just saw the "HID: wacom: fix timeout on probe for some wacoms" mail,
which probably has to do something with my problem.
Any ideas?
Cheers,
Jonas
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