This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1893752 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Changed in: linux (Ubuntu Focal) Status: New => Incomplete -- 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/1893752 Title: Get the extended DPCD according to the related field in the DPCD registers. Status in HWE Next: New Status in linux package in Ubuntu: Incomplete Status in linux-oem-5.6 package in Ubuntu: New Status in linux source package in Focal: Incomplete Status in linux-oem-5.6 source package in Focal: In Progress Bug description: [Impact] Connect the 4K@60Hz monitor on WD19, the monitor can't light. [Fix] As per DP spec, at first check DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT. If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 1, read the DP_DP13_DPCD_REV to get the faster capability. If DP_EXTENDED_RECEIVER_CAP_FIELD_PRESENT is 0, read DP_DPCD_REV. [Test] With the patches, connect 4K@60Hz monitor on WD19, the machine can output the video to the monitor and the monitor can light. [Regression] low, Just get one more DPCD from the extended register, compare them and get the faster one. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1893752/+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