[Bug 70145] Random blank screen after login with Haswell 4400

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70145

--- Comment #9 from Maksim Lin <maks at manichord.com> ---
Sorry I should have also said that I am usually running with the patch from
https://bugs.freedesktop.org/show_bug.cgi?id=73694 applied, though I have seen
this happen when running with kernels without the patch applied.

Also sometimes this occurs, even a reboot does not resolve the problem - even
the firmware ("bios") splash screens dont show and I have to pull out the
battery and reboot - this has only happened when I've been out and not has an
external screen to connect to, as when this same thing happens when docked in a
Dell eDock or connected to HDMI via laptops own HDMI port, I see the firmware
boot screens show up on the external monitor.

Also since I'm building my own kernel already I'm happy to try out any patches
or alternative git branches that people could point me to test.

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