[Bug 91438] hard lockup after switching between laptop's panel and external monitor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91438

--- Comment #3 from ivan <ivan.mitev at gmail.com> ---
Created attachment 117833
  --> https://bugs.freedesktop.org/attachment.cgi?id=117833&action=edit
dmesg

Hi Rodrigo,

I compiled/tested a kernel from the psr-delayed-enable branch.

Laptop on AC, undocked, psr=1, fbc=0

- at boot after modeset, screen freezes, like in bug 91436
- a suspend/resume cycle doesn't help with "unfreezing" the display. At resume
the display will show the current laptop state (eg. if I suspend the laptop
when the screen is frozen at the luks password prompt, at resume I'll see X's
login screen), but the screen will freeze instantly again (can't see the mouse
pointer moving).
- laptop is responsive though, ssh'ed into it; see attached dmesg with debug
output (boot + 2 suspend/resume cycles).
- reboot -> oops

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