** Changed in: linux (Ubuntu Focal) Status: Incomplete => Won't Fix
** Changed in: linux (Ubuntu) Status: Incomplete => Fix Released ** Changed in: hwe-next Status: New => Fix Released -- 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: Fix Released Status in linux package in Ubuntu: Fix Released Status in linux-oem-5.6 package in Ubuntu: Invalid Status in linux source package in Focal: Won't Fix Status in linux-oem-5.6 source package in Focal: Fix Released 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