** Tags added: kernel-fixed-upstream kernel-fixed-upstream-4.16.18
kernel-fixed-upstream-4.17.13 kernel-fixed-upstream-4.18-rc8
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1785481
Title:
amdgpu WQHD resolution(2560 × 1440) not available
Status in linux package in Ubuntu:
Confirmed
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)
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ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: frederic 2366 F.... pulseaudio
/dev/snd/controlC1: frederic 2366 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 16.04
HibernationDevice: RESUME=/dev/mapper/Fred_SSD-Fred_Swap
IwConfig:
lo no wireless extensions.
em1 no wireless extensions.
MachineType: ASUS All Series
Package: linux (not installed)
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-29-generic
root=/dev/mapper/Fred_SSD-Fred_Root ro quiet
ProcVersionSignature: Ubuntu 4.15.0-29.31~16.04.1-generic 4.15.18
RelatedPackageVersions:
linux-restricted-modules-4.15.0-29-generic N/A
linux-backports-modules-4.15.0-29-generic N/A
linux-firmware 1.157.20
RfKill:
Tags: xenial
Uname: Linux 4.15.0-29-generic x86_64
UpgradeStatus: Upgraded to xenial on 2016-12-17 (596 days ago)
UserGroups: adm cdrom dip lp lpadmin plugdev sambashare scanner sudo video
_MarkForUpload: True
dmi.bios.date: 10/28/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3003
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: MAXIMUS VII RANGER
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr3003:bd10/28/2015:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnMAXIMUSVIIRANGER:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: ASUS MB
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS
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