This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed- focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: verification-needed-focal -- 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/1910211 Title: Fix the video can't output through WD19TB connected with TGL platform during cold-boot Status in HWE Next: New Status in linux package in Ubuntu: In Progress Status in linux-oem-5.10 package in Ubuntu: Invalid Status in linux source package in Focal: Invalid Status in linux-oem-5.10 source package in Focal: Fix Released Status in linux source package in Hirsute: In Progress Status in linux-oem-5.10 source package in Hirsute: Invalid Bug description: [Impact] After Apply the patches from https://www.spinics.net/lists/intel-gfx/msg248700.html, the TGL platform would have the failure rate(1/20) on outputting the video through WD19TB. [Fix] The patch is provided by Imre(https://gitlab.freedesktop.org/drm/intel/-/issues/2801#note_740352). If there's no lttpr in the link chain, the DRM driver wouldn't configure the transparent mode again. [Test Case] 1. Connected the WD19TB with the TGL platform and connected the external monitor on WD19TB with HDMI/Displayport. 2. Don't plug the external monitor on the TGL platform, so there's only one monitor on WD19TB. 3. Cold boot the TGL platform. 4. Check the monitor can be blinked and the video can output to the monitor. [Where problems could occur] As per Imre's comment, this may be caused by the dock. In the future if the WD19TB's firmware is updated, we may encounter the same issue again. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1910211/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
