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I use ubuntu 16.04 with hwe stack and an Radeon R9 285. With kernel 4.13 and older, I can use a resolution of 2560x1440. But, since the upgrade to kernel 4.15, I'm limited to the 1920x1200. I have attached the output of xrandr on both kernel. My screen (Dell U2713HM) is plugged to the output DVI-1. With a kernel 4.13, the output is detected as a DVI-I. But with a kernel 4.15, the output is detected as a DVI-D. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.15.0-29-generic 4.15.0-29.31~16.04.1 ProcVersionSignature: Ubuntu 4.15.0-29.31~16.04.1-generic 4.15.18 Uname: Linux 4.15.0-29-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 CurrentDesktop: Unity Date: Sun Aug 5 16:46:32 2018 SourcePackage: linux-signed-hwe UpgradeStatus: Upgraded to xenial on 2016-12-17 (595 days ago) ** Affects: linux (Ubuntu) Importance: Low Status: Incomplete ** Tags: amd64 apport-bug xenial -- amdgpu WQHD resolution(2560 × 1440) not available https://bugs.launchpad.net/bugs/1785481 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. -- 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