Donk, thank you for reporting this and helping make Ubuntu better. Could you please run the following command in a terminal as it will automatically gather and attach debug information to this report: apport-collect 1785481
** Package changed: linux-signed-hwe (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: New => Incomplete ** Tags added: regression-update -- 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/1785481 Title: amdgpu WQHD resolution(2560 × 1440) not available Status in linux package in Ubuntu: Incomplete Bug description: Hello, 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1785481/+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