linux-kernel - Re: Bug 103796 - 4.9.62: intermittent flicker after upgrade from 4.9.61

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <99e3f5a5-c502-0e93-c60f-e373bf321859@mailbox.org>
Date:   Fri, 17 Nov 2017 23:55:55 +0100
From:   Rainer Fiebig <jrf@...lbox.org>
To:     linux-kernel@...r.kernel.org
Subject: Re: Bug 103796 - 4.9.62: intermittent flicker after upgrade from
 4.9.61

Yes, it's the i915-backports that cause the problem:

- diff --git a/drivers/gpu/drm/i915/intel_pm.c
b/drivers/gpu/drm/i915/intel_pm.c
    index 49de476..277a802 100644
- diff --git a/drivers/gpu/drm/i915/intel_drv.h
b/drivers/gpu/drm/i915/intel_drv.h
    index a19ec06..3ce9ba3 100644

After reversing *both* (else the kernel won't compile) the flicker is
gone, no more messages in dmesg. All else OK so far.

Please do yourself and us users with older Intel CPU/GPU a favour and
don't backport i915-stuff anymore for 4.9! It's risky and probably
needless: until 4.9.60/61 everything was absolutely fine.

Keep in mind that 4.4 is also unusable with those processors b/c of
i915-problems (as you probably know).

And I have a premonition now concerning 4.14. ;)

So long!

Rainer Fiebig

-- 
The truth always turns out to be simpler than you thought.
Richard Feynman