Public bug reported:
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. 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.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux (Ubuntu Kinetic)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux-oem-6.1 (Ubuntu Kinetic)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Lunar)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux-oem-6.1 (Ubuntu Lunar)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Mantic)
Importance: Undecided
Assignee: koba (kobako)
Status: In Progress
** Affects: linux-oem-6.1 (Ubuntu Mantic)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.1 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.1 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Kinetic)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.1 (Ubuntu Kinetic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Mantic)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.1 (Ubuntu Mantic)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Lunar)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.1 (Ubuntu Lunar)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Kinetic)
Status: New => In Progress
** Changed in: linux (Ubuntu Kinetic)
Assignee: (unassigned) => koba (kobako)
** Changed in: linux (Ubuntu Jammy)
Status: New => In Progress
** Changed in: linux (Ubuntu Jammy)
Assignee: (unassigned) => koba (kobako)
** Changed in: linux (Ubuntu Lunar)
Status: New => In Progress
** Changed in: linux (Ubuntu Lunar)
Assignee: (unassigned) => koba (kobako)
** Changed in: linux (Ubuntu Mantic)
Status: New => In Progress
** Changed in: linux (Ubuntu Mantic)
Assignee: (unassigned) => koba (kobako)
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Status: New => In Progress
** Changed in: linux-oem-6.1 (Ubuntu Jammy)
Assignee: (unassigned) => koba (kobako)
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/2023004
Title:
Fix Disable thunderbolt clx make edp-monitor garbage while moving the
touchpad
Status in linux package in Ubuntu:
In Progress
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:
In Progress
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:
In Progress
Status in linux-oem-6.1 source package in Lunar:
New
Status in linux source package in Mantic:
In Progress
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. 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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2023004/+subscriptions
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