Hi Imre,
On 9/2/25 6:13 PM, Imre Deak wrote:
This looks like the issue tracked at https://gitlab.freedesktop.org/drm/amd/-/issues/4500
Thanks! I wasn't aware of that issue being tracked already.
The correct solution there is to disable the DPCD probing, which AMD folks are working on atm. Until that, could you give a go to patch [1] on the above ticket equivalent to this solution, applying on v6.17, or the attached patch achieving the same on v6.16.4?
I can confirm your patch fixes the issue on v6.16.4.
Also it would help if you could add a dmesg log on the ticket taken after booting with drm.debug=0x100 and reproducing the problem (vs. two other drm.debug=0x100 logs, one with the above DP_TRAINING_PATTERN_SET -> DP_LANE0_1_STATUS change and another one with DPCD probing disabled as I requested above, taken after booting up and connecting the dock/monitor).
Done. I attached 3 dmesg logs to the ticket: - GOOD: Linux 6.16.4 with DPCD probing disabled - BAD: Linux 6.17.0-rc4 - GOOD: Linux 6.17.0-rc4 with the probe address set to DP_LANE0_1_STATUS Regards, -- Wolfgang Frisch <wolfgang.fri...@suse.com> Security Engineer OpenPGP fingerprint: A2E6 B7D4 53E9 544F BC13 D26B D9B3 56BD 4D4A 2D15 SUSE Software Solutions Germany GmbH, Frankenstraße 146, 90461 Nürnberg
OpenPGP_signature.asc
Description: OpenPGP digital signature
