[Bug 2133143] Re: Could not output video from type-c to VGA adapter

** Tags added: jira-somerville-3600

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https://bugs.launchpad.net/bugs/2133143

Title:
Could not output video from type-c to VGA adapter

Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-6.14 package in Ubuntu:
Invalid
Status in linux-oem-6.17 package in Ubuntu:
Invalid
Status in linux source package in Noble:
In Progress
Status in linux-oem-6.14 source package in Noble:
In Progress
Status in linux-oem-6.17 source package in Noble:
In Progress
Status in linux source package in Plucky:
In Progress
Status in linux-oem-6.14 source package in Plucky:
Invalid
Status in linux-oem-6.17 source package in Plucky:
Invalid
Status in linux source package in Questing:
In Progress
Status in linux-oem-6.14 source package in Questing:
Invalid
Status in linux-oem-6.17 source package in Questing:
Invalid
Status in linux source package in Resolute:
In Progress
Status in linux-oem-6.14 source package in Resolute:
Invalid
Status in linux-oem-6.17 source package in Resolute:
Invalid

Bug description:
[Impact]
Plugged the Lenovo USB-C to VGA adapter or Dell DA310 hub to thunderbolt 5 port, the communication through AUX timed out, and there is no video output to the VGA monitor

i915 0000:00:02.0: [drm:drm_dp_dpcd_read [drm_display_helper]] AUX
USBC4/DDI TC4/PHY TC4: 0x00000 AUX -> (ret=-110)

[Fix]
https://lkml.org/lkml/2025/11/27/193

[Test]
1. Find a device with TB5 port
2. Plug a VGA monitor to Lenovo USB-C to VGA adapter[17ef:7217] or Dell DA310[413c:c010]
3. Plug the adapter/hub to the TB5 port
4. The external monitor should work as expected.

[Where problems could occur]
It handles the fail case and doesn't affect the code path if it already works. No regression.

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