Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.19 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19 ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- 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/1799613 Title: In kernel 4.14.59, monitor resolution is detected correctly. In kernels after that, they are not detected correctly. Status in linux package in Ubuntu: Incomplete Bug description: dpkg --list | grep linux-image ii linux-image-4.15.0-36-generic 4.15.0-36.39 amd64 Signed kernel image generic ii linux-image-4.15.0-38-generic 4.15.0-38.41 amd64 Signed kernel image generic ii linux-image-generic 4.15.0.38.40 amd64 Generic Linux kernel image ii linux-image-unsigned-4.14.59-041459-generic 4.14.59-041459.201807280929 amd64 Linux kernel image for version 4.14.59 on 64 bit x86 SMP Booting from GRUB into 4.14.59 allows my two monitors to run at their native resolution, 2560x1440. Any newer kernel does not allow my two monitors to run at their native resolution, only allowing up to 1920x1200. uname -a Linux blackbox 4.14.59-041459-generic #201807280929 SMP Sat Jul 28 09:32:10 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799613/+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
