Bug#945055: linux: CPU runs at considerably higher temperatures)

From	Christoph Anton Mitterer <calestyo@scientia.net>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#945055: linux: CPU runs at considerably higher temperatures)
Date	2020-01-23 14:00 +0100
Message-ID	<zrKfv-Dt-5@gated-at.bofh.it> (permalink)
References	<z43W1-5SN-1@gated-at.bofh.it> <ze0tP-5MX-7@gated-at.bofh.it> <z43W1-5SN-1@gated-at.bofh.it> <ze0tP-5MX-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Cross-posted to 2 groups.

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Control: found -1 3.16.81-1
Control: found -1 4.19.87-1
Control: found -1 5.4-1~exp1
Control: found -1 5.5~rc5-1~exp1
Control: tags -1 + patch
Control: forwarded -1 https://gitlab.freedesktop.org/drm/intel/issues/614


Hey.

The offending patch is apparently:
drm/i915/gen8+: Add RC6 CTX corruption WA

which is contained in:
$ git log --oneline --all | grep "drm/i915/gen8+: Add RC6 CTX
corruption WA"
5013e6d917ac drm/i915/gen8+: Add RC6 CTX corruption WA
2248a28384fe drm/i915/gen8+: Add RC6 CTX corruption WA
d4360736a7c0 drm/i915/gen8+: Add RC6 CTX corruption WA
255ed51599de drm/i915/gen8+: Add RC6 CTX corruption WA
1a5a64e0bde8 drm/i915/gen8+: Add RC6 CTX corruption WA
00194ecfb32c drm/i915/gen8+: Add RC6 CTX corruption WA
284d38667f7e drm/i915/gen8+: Add RC6 CTX corruption WA
7e34f4e4aad3 drm/i915/gen8+: Add RC6 CTX corruption WA

$ git describe --contains  5013e6d917ac 2248a28384fe d4360736a7c0
255ed51599de 1a5a64e0bde8 00194ecfb32c 284d38667f7e 7e34f4e4aad3
v3.16.77~12
v5.5-rc1~28^2~19
v5.3.11~20
v4.19.84~28
v4.14.154~28
v4.9.201~2
v4.4.201~2
v5.4-rc8~28^2~1


The issue seems to affect *all* the i915/gen8+ GPUs, preventing them to
enter sleep states.

It seems a patch is available at 
https://gitlab.freedesktop.org/drm/intel/issues/614
and according to 
https://gitlab.freedesktop.org/drm/intel/issues/953#note_385488 these
seem to be the final versions(?).

Apparently it's however kinda stuck to get them in a stable release
(not really sure why), so could you possibly cherry pick the patch,
since that issue is really a major showstopper for all affected people.


Cheers,
Chris.

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Bug#945055: linux: CPU runs at considerably higher temperatures) Christoph Anton Mitterer <calestyo@scientia.net> - 2020-01-23 14:00 +0100
  Processed: linux: CPU runs at considerably higher temperatures) "Debian Bug Tracking System" <owner@bugs.debian.org> - 2020-01-23 14:00 +0100
  Bug#945055: linux: CPU runs at considerably higher temperatures) Christoph Anton Mitterer <calestyo@scientia.net> - 2020-01-23 14:10 +0100

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