Here's a link to my report of this to Freedesktop.org:
https://bugs.freedesktop.org/show_bug.cgi?id=100992.
** Bug watch added: freedesktop.org Bugzilla #100992
https://bugs.freedesktop.org/show_bug.cgi?id=100992
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This was actually on Elementary OS, but I've tried with a 4.2 kernel
where the problem does not exist.
I've now also tries 4.12.0-041200rc1 and this input hang does not occur.
Booting with this kernel does render my WiFi inoperable, though. I
suppose that might happen when trying non-offical
Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.12
Here's a partial dmesg log from a locked screen to the hang with
drm:debug=0xe.
** Attachment added: "dmesg_drm_debug.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1689651/+attachment/4874740/+files/dmesg_drm_debug.txt
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Don't know if the stack trace was actually attached:
[ 2205.056641] [ cut here ]
[ 2205.056675] WARNING: CPU: 1 PID: 1240 at
/build/linux-FyIZxz/linux-4.4.0/drivers/gpu/drm/drm_irq.c:1326
drm_wait_one_vblank+0x1b5/0x1c0 [drm]()
[ 2205.056677] vblank wait timed out on
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