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Subject: Re: Fwd: Thinkpad X13 AMD: Problems with external monitor wake up
 after suspend
To:     Thorsten Leemhuis <regressions@leemhuis.info>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Linux Regressions <regressions@lists.linux.dev>,
        Linux AMDGPU <amd-gfx@lists.freedesktop.org>
Cc:     Wayne Lin <wayne.lin@amd.com>, Stylon Wang <stylon.wang@amd.com>,
        Daniel Wheeler <daniel.wheeler@amd.com>,
        Alex Deucher <alexander.deucher@amd.com>,
        Mario Limonciello <mario.limonciello@amd.com>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>
References: <8da256ea-b069-44f0-9cc2-93482c2f5eec@gmail.com>
 <da0efb19-c883-40c8-b284-7eb7f4d3640b@leemhuis.info>
From:   Oliver Schmidt <oliver@luced.de>
Message-ID: <12db0c2e-a1b7-f8f9-278e-8aefe5619c1f@luced.de>
Date:   Fri, 1 Dec 2023 20:05:52 +0100
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On 01.12.23 12:37, Thorsten Leemhuis wrote:
> Maybe one of the developers among the recipients has a idea. Oliver, but
> if none of them replies any time soon, it would be best if you'd check
> if 6.6 (and/or 6.7-rc) is affected as well; and if reverting it there
> fixes it, too.

OK, I checked it: compiled a 6.6.3 kernel and got the same suspend-resume
problem as with the 6.1.57 and 6.1.64 kernels. I also was able to revert the
changes of commit ec5fa9 "drm/amd/display: Adjust the MST resume flow" in the
6.6.3 kernel and the problem was solved as in the 6.1.x kernels (however it
seems that resuming with the 6.6 kernel needs a little more time until the
monitor gets signal).

Best regards,
Oliver