Public bug reported:
[Impact]
Pantherlake device has VBT (Video BIOS Table) version 266, which reports a
child device config size of 44 bytes. However, the kernel expected only 40
bytes, causing the error:
ERROR Unexpected child device config size 44 (expected 40 for VBT version
266)
[Fix]
This commit included in v6.18-rc1 fix the issue
4d33c77cf2c3 drm/i915/vbt: Add eDP Data rate overrride field in VBT
[Test]
Boot up PTL system and check dmesg, there should be no the error message like
xe: [drm] ERROR Unexpected child device config size 44 (expected 40 for VBT
version 266)
[Where problems could occur]
No, it adds the setting for the latest PTL device with link rate equal to 263.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-6.17 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Noble)
Importance: Undecided
Status: Invalid
** Affects: linux-oem-6.17 (Ubuntu Noble)
Importance: Undecided
Assignee: AceLan Kao (acelankao)
Status: In Progress
** Affects: linux (Ubuntu Questing)
Importance: Undecided
Assignee: AceLan Kao (acelankao)
Status: In Progress
** Affects: linux-oem-6.17 (Ubuntu Questing)
Importance: Undecided
Status: Invalid
** Tags: jira-somerville-3314 jira-somerville-3348 oem-priority somerville
** Also affects: linux-oem-6.17 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Questing)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.17 (Ubuntu Questing)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.17 (Ubuntu Noble)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Noble)
Status: New => Invalid
** Changed in: linux (Ubuntu Questing)
Status: New => In Progress
** Changed in: linux-oem-6.17 (Ubuntu Noble)
Status: New => In Progress
** Changed in: linux-oem-6.17 (Ubuntu Questing)
Status: New => Invalid
** Changed in: linux-oem-6.17 (Ubuntu Noble)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Changed in: linux (Ubuntu Questing)
Assignee: (unassigned) => AceLan Kao (acelankao)
** Tags added: jira-somerville-3348 oem-priority somerville
** Tags added: jira-somerville-3314
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https://bugs.launchpad.net/bugs/2129157
Title:
xe: [drm] *ERROR* Unexpected child device config size 44 (expected 40
for VBT version 266)
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