[Bug 111919] Intel card (Coffeelake) short freezes (hang) after upgrade to kernel 5.3.4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111919

--- Comment #14 from ilvez <bugsfree at xor.ee> ---
Not sure  whether I should open new report. I think I've been hit by the same
bug with similar characteristics.

I started to notice short (second, mostly less) freezes with 5.3 kernel (don't
know the exact version, since I got it from Debian unstable it surely wasn't
the initial 5.3.0). With 5.2 kernel everything was fine. I notice freezes only
in Firefox and Thunderbird.

I get the same dmesg output (mostly Resetting rcs0 for hang on rcs0).
/sys/class/drm/card0/error got generated I think when I tried to close message
window in Thunderbird. If you want I can upload my /sys/class/drm/card0/error.

Not every freeze in Firefox/Thunderbird generates "Resetting..." message to
Firefox, so I'm not 100% sure that these are related actually. I connected
these things today, so I start monitoring.

I haven't compiled running kernel from source in a years, so I can't currently
do it. If you point me to good instructions, I can try to git-bisect this.

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