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-oem-5.6 in Ubuntu. https://bugs.launchpad.net/bugs/1902613 Title: drm/i915/dp_mst - only read the base capability in DPCD. Status in HWE Next: New Status in linux-oem-5.6 package in Ubuntu: Invalid Status in linux-oem-5.6 source package in Focal: Fix Committed Bug description: [Impact] Currently DRM driver assume the source device caps is higher than the MST device caps. With this commit, the statement would be broken. e.g. the source device only support DP1.2 and the mst device support DP1.4. The source device can't output the video to the external monitor on the docking station. [Fix] Revert the previous patch and only read the base capability from DPCD. [test] With the patch, The machine(DP1.2) connect with the external monitor on docking station(SC) and can output the video to the external monitor on docking station(SC-DP1.4). [Regression Potential] Can't output 4k@60hz on the docking station(SC). To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1902613/+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
