@Christopher Done, https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe/+bug/1785481
-- 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/1767701 Title: amdgpu WQHD resolution not working Status in linux package in Ubuntu: Expired Bug description: After upgrade to bionic the highest detected resolution of my monitor was 1920x1200 instead of the 2560x1440 that it is capable of and that worked previously. My graphics card is a Radeon RX480 and this seems to be related to the AMDGPU DC changes in kernel 4.15. This is also fixed on latest 4.16.5 upstream kernel from the kernel ppa, i.e. the maximum resolution is correctly detected without amdgpu.dc=0 as boot parameter. attached are the xorg files after booting the 4.15 and 4.16.5 kernels both without amdgpu.dc=0. The main difference seems to be the probed modes. WORKAROUND: Pass kernel boot parameter: amdgpu.dc=0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1767701/+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
