Created attachment 304641 [details] lspci -v output Summary ------- When using a thunderbolt dock with 2x DisplayPort connectors, the displayys are not recognized when connected with DP->HDMI cables. Connecting over DP->DP cables work as expected. Expected Behaviour ------------------ Displays connected to the dock via DP->HDMI cables should be recognized. Actual Behaviour ---------------- Displays connected to the dock via DP->HDMI cables are not recognized. The following messages are reported in `dmesg` ``` [68022.156971] thunderbolt 0-2: new device found, vendor=0x6f device=0x12 [68022.156977] thunderbolt 0-2: StarTech.com TB3CDK2DP ...various USB connection messages... [68139.834086] [drm] DMUB HPD callback: link_index=2 [68139.834859] [drm] DPIA AUX failed on 0x0(1), error 3 [68139.836167] [drm] DPIA AUX failed on 0x0(1), error 3 (etc) ``` USB ports and network connection functions as expected. Steps to Reproduce ------------------ Laptop used is Asus G14 (2023) model GA402NV Dock is Startech TB3CDK2DP Reproduced on Linux Kernel 6.4.3 from stable repo 1. Connect laptop to dock over USB-C 2. Connect an external display with DP->HDMI cable 3. Open appropriate display settings to see if external display is recognized.
Created attachment 304642 [details] journalctl --dmesg output
Created attachment 304643 [details] kernel config
(In reply to Andew Marshall from comment #0) > Created attachment 304641 [details] > lspci -v output > > Summary > ------- > > When using a thunderbolt dock with 2x DisplayPort connectors, the displayys > are not recognized when connected with DP->HDMI cables. Connecting over > DP->DP cables work as expected. > > Expected Behaviour > ------------------ > > Displays connected to the dock via DP->HDMI cables should be recognized. > > Actual Behaviour > ---------------- > > Displays connected to the dock via DP->HDMI cables are not recognized. The > following messages are reported in `dmesg` > > ``` > [68022.156971] thunderbolt 0-2: new device found, vendor=0x6f device=0x12 > [68022.156977] thunderbolt 0-2: StarTech.com TB3CDK2DP > ...various USB connection messages... > [68139.834086] [drm] DMUB HPD callback: link_index=2 > [68139.834859] [drm] DPIA AUX failed on 0x0(1), error 3 > [68139.836167] [drm] DPIA AUX failed on 0x0(1), error 3 > (etc) > ``` > USB ports and network connection functions as expected. > > > Steps to Reproduce > ------------------ > > Laptop used is Asus G14 (2023) model GA402NV > Dock is Startech TB3CDK2DP > Reproduced on Linux Kernel 6.4.3 from stable repo > > 1. Connect laptop to dock over USB-C > 2. Connect an external display with DP->HDMI cable > 3. Open appropriate display settings to see if external display is > recognized. Do you have this issue on v6.1 stable series?
(In reply to Bagas Sanjaya from comment #3) > > Do you have this issue on v6.1 stable series? I tried v6.1 and I get the same issue, although there are no drm errors in the log. Just the one message: ``` [ 214.332514] [drm] DMUB HPD callback: link_index=2 ```
This is very likely a GPU driver or GPU microcode bug. Can you please bring the issue to https://gitlab.freedesktop.org/drm/amd/-/issues