https://bugzilla.kernel.org/show_bug.cgi?id=217674 Bug ID: 217674 Summary: Thunderbolt dock does not recognize displays connected via DP->HDMI cable Product: Drivers Version: 2.5 Hardware: AMD OS: Linux Status: NEW Severity: normal Priority: P3 Component: USB Assignee: drivers_usb@xxxxxxxxxxxxxxxxxxxxxx Reporter: planetmarshalluk@xxxxxxxxx Regression: No Created attachment 304641 --> https://bugzilla.kernel.org/attachment.cgi?id=304641&action=edit 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. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
