From: bugzilla-daemon@kernel.org
To: linux-usb@vger.kernel.org
Subject: [Bug 217674] New: Thunderbolt dock does not recognize displays connected via DP->HDMI cable
Date: Sun, 16 Jul 2023 09:10:35 +0000 [thread overview]
Message-ID: <bug-217674-208809@https.bugzilla.kernel.org/> (raw)
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@kernel-bugs.kernel.org
Reporter: planetmarshalluk@gmail.com
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.
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next reply other threads:[~2023-07-16 9:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-16 9:10 bugzilla-daemon [this message]
2023-07-16 9:17 ` [Bug 217674] Thunderbolt dock does not recognize displays connected via DP->HDMI cable bugzilla-daemon
2023-07-16 9:18 ` bugzilla-daemon
2023-07-16 11:15 ` bugzilla-daemon
2023-07-16 20:46 ` bugzilla-daemon
2023-07-17 19:37 ` bugzilla-daemon
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