** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/2023004
Title:
Fix Disable thunderbolt clx make edp-monitor garbage while moving the
touchpad
Status in HWE Next:
New
Status in linux package in Ubuntu:
Fix Committed
Status in linux-oem-6.1 package in Ubuntu:
New
Status in linux source package in Jammy:
In Progress
Status in linux-oem-6.1 source package in Jammy:
Fix Committed
Status in linux source package in Kinetic:
In Progress
Status in linux-oem-6.1 source package in Kinetic:
New
Status in linux source package in Lunar:
Fix Committed
Status in linux-oem-6.1 source package in Lunar:
New
Status in linux source package in Mantic:
Fix Committed
Status in linux-oem-6.1 source package in Mantic:
New
Bug description:
[impact]
The default sync pulse length for fast wake AUX transactions was changed from
18 to 10, which was causing issues with some eDP panels.
[fix]
Revert the sync pulse length for fast wake AUX transactions back to the
hardware default of 18 (10 precharge + 8 preamble).
[test cases]
1. configure with thunderbolt.clx=0.
2. check edp's behavior and it should work well and there's no garbage.
[where the issue could happen]
low, By reverting this setting back to the default, this commit restores
stability for configurations using fast wake AUX transactions, especially those
involving eDP panels that were incompatible with the shorter sync pulse length.
The longer, hardware-default sync pulse length is compatible with more use
cases.
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