** Also affects: linux-oem-5.17 (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux-oem-5.17 (Ubuntu Jammy)
Status: New => In Progress
** Changed in: linux-oem-5.17 (Ubuntu Jammy)
Assignee: (unassigned) => koba (kobako)
** Tags added: originate-from-1974155
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https://bugs.launchpad.net/bugs/1967986
Title:
Fix ADL, WD22TB4,Dual monitors display resolution can't reach 4K 60hz
Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.14 package in Ubuntu:
New
Status in linux-oem-5.17 package in Ubuntu:
New
Status in linux source package in Focal:
New
Status in linux-oem-5.14 source package in Focal:
Fix Released
Status in linux-oem-5.17 source package in Focal:
New
Status in linux source package in Jammy:
Fix Committed
Status in linux-oem-5.14 source package in Jammy:
New
Status in linux-oem-5.17 source package in Jammy:
In Progress
Bug description:
[Impact]
SUT attach WD22TB4 dock, plug in two 4K monitor, the monitor resolution can't
reach 4K 60Hz
[Fix]
Fix maximum DP source rate.
this patch should be taken first,
73867c8709) drm/i915/display: Remove check for low voltage sku for max dp
source rate
Then, on U/J/OEM-5.14, apply 3fd6afb623ba) drm/i915/intel_combo_phy:
Print I/O voltage info,
[Test Case]
1. Connect two 4K external monitor to WD22TB4
2. the monitor resolution can reach 4K 60Hz
[Where problems could occur]
Low
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