APPLIED/Cmnt: [SRU][Q][PATCH v2 0/2] Intel, External monitor flickers or no output when connected to WD25 dock

[Stefan Bader]

On 30/12/2025 01:09, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao at canonical.com>
> 
> BugLink: https://bugs.launchpad.net/bugs/2136979
> 
> [Impact]
> When the external monitor is connected to the WD25 dock, the external
> monitor shows black screen, move the cursor, screen flickers.
> 
> [Fix]
> The commit in v6.19-rc1 fixes the issue
> e109f644b871d drm/i915/dp_mst: Disable Panel Replay
> 
> To fix the conflict, cherry picked this commit from v6.18-rc1, too
> 9cc10041e9fe7 drm/i915/psr: Check drm_dp_dpcd_read return value on PSR dpcd init
> 
> [Test]
> 1. Boot to OS, Connect WD25 Dock and plug a DP/HDMI/MFDP monitor.
> 2. Check external monitor states
> 
> [Where problems could occur]
> The drm_dp_dpcd_read() doesn't affect the call path, and disable dp_mst
> panel replay is reasonable. Both commits look pretty safe to me.
> 
> v2. Fixed the wrong subject on the cover letter
> 
> Imre Deak (1):
>    drm/i915/dp_mst: Disable Panel Replay
> 
> Jouni Högander (1):
>    drm/i915/psr: Check drm_dp_dpcd_read return value on PSR dpcd init
> 
>   drivers/gpu/drm/i915/display/intel_psr.c | 36 ++++++++++++++++--------
>   1 file changed, 25 insertions(+), 11 deletions(-)
> 
> --
> 2.43.0
> 
> 

[Questing update: v6.17.10 upstream stable release]

Applied to Already applied as part of upstream stable. Adjusted bug 
references only. Thanks.

-Stefan

-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_0xE8675DEECBEECEA3.asc
Type: application/pgp-keys
Size: 52669 bytes
Desc: OpenPGP public key
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20260123/88dc1082/attachment-0001.key>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature.asc
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/kernel-team/attachments/20260123/88dc1082/attachment-0001.sig>