** Changed in: hwe-next
Status: Fix Committed => Fix Released
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-oem-5.14 in Ubuntu.
https://bugs.launchpad.net/bugs/1979267
Title:
Fix WD22TB4 suspend and resume, two external monitor can not output
Status in HWE Next:
Fix Released
Status in linux package in Ubuntu:
Fix Released
Status in linux-oem-5.14 package in Ubuntu:
Invalid
Status in linux-oem-5.17 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Invalid
Status in linux-oem-5.14 source package in Focal:
Fix Released
Status in linux-oem-5.17 source package in Focal:
Invalid
Status in linux source package in Jammy:
Fix Released
Status in linux-oem-5.14 source package in Jammy:
Invalid
Status in linux-oem-5.17 source package in Jammy:
Fix Released
Bug description:
[Impact]
Resume SUT from suspend mode, found external monitors can not output, but
display setting can recognize external monitors.
[Fix]
The WD22TB4 Thunderbolt dock at least will revert its DP_MAX_LINK_RATE
from HBR3 to HBR2 after system suspend/resume if the DP_DP13_DPCD_REV
registers are not read subsequently also as required.
Fix this by reading DP_DP13_DPCD_REV registers as well, matching what is
done during connector detection. While at it also fix up the same call
in drm_dp_mst_dump_topology().
[Test Case]
1. Connect two 4K external monitor to WD22TB4.
2. Put SUT into suspend mode and wait 30sec
3. Resume SUT from suspend mode, found external monitors can not output.
[Where problems could occur]
low
To manage notifications about this bug go to:
https://bugs.launchpad.net/hwe-next/+bug/1979267/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
