You have been subscribed to a public bug:
After the Ubuntu distro upgrade (upgrade from LTS 20.04 to LTS 22.04,
running KDE) I started experiencing a problem with external screen
resolution after the wake up from sleep. The monitor resolution is small
(1280x768) and doesn't respect the setting prior the sleep (1920x1200).
After the wake up from sleep:
```
> xrandr
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 connected primary 1280x768+0+0 (normal left inverted right x axis
y axis) 535mm x 339mm
1280x768 59.94*
# a list of lower resolutions
```
There is an error when trying to change the setting to the highest
resolution supported by the monitor (which is not included in the above
list).
```
> xrandr --output DisplayPort-1 --mode 1920x1200
xrandr: cannot find mode 1920x1200
```
After the turn off and turn on of the external monitor, the resolution
is somehow added to the xrandr list:
```
> xrandr
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 connected primary 1280x768+0+0 (normal left inverted right x axis
y axis) 535mm x 339mm
1920x1200 59.95 +
# a list of resolutions
1280x768 59.94*
# a list of lower resolutions
```
Now it is possible to change the resolution:
```
> xrandr --output DisplayPort-1 --mode 1920x1200
# no output, the resolution was successfully changed
```
After the change, the resolution is successfully changed and xrandr
gives proper output:
```
> xrandr
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 connected primary 1920x1200+0+0 (normal left inverted right x
axis y axis) 535mm x 339mm
1920x1200 59.95*+
# a list of lower resolutions
```
The problem is not present on fresh start. However, it is consistently
present after the wake up from sleep.
What can cause the problem and how may I fix it?
Running AMD based laptop (Ryzen 7 3700U with integrated graphics), the
external monitor is connected via USB-C. There are no problems with
laptop screen resolution, only external monitor is affected.
ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: xorg 1:7.7+23ubuntu2
ProcVersionSignature: Ubuntu 5.15.0-37.39-generic 5.15.35
Uname: Linux 5.15.0-37-generic x86_64
ApportVersion: 2.20.11-0ubuntu82.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: unknown
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: KDE
Date: Thu Jun 16 18:12:05 2022
DistUpgraded: 2022-05-08 07:52:25,560 DEBUG icon theme changed, re-reading
DistroCodename: jammy
DistroVariant: ubuntu
ExtraDebuggingInterest: No
GraphicsCard:
Advanced Micro Devices, Inc. [AMD/ATI] Picasso/Raven 2 [Radeon Vega Series /
Radeon Vega Mobile Series] [1002:15d8] (rev c1) (prog-if 00 [VGA controller])
Subsystem: Lenovo ThinkPad E595 [17aa:5124]
InstallationDate: Installed on 2019-08-21 (1030 days ago)
InstallationMedia: Kubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
MachineType: LENOVO 20NE000BMC
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-37-generic
root=UUID=0fff4104-4909-4124-b8b0-8430281f24be ro open splash iommu=soft
vt.handoff=7
RebootRequiredPkgs: Error: path contained symlinks.
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to jammy on 2022-05-08 (39 days ago)
dmi.bios.date: 01/26/2022
dmi.bios.release: 1.24
dmi.bios.vendor: LENOVO
dmi.bios.version: R11ET44W (1.24 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20NE000BMC
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.24
dmi.modalias:
dmi:bvnLENOVO:bvrR11ET44W(1.24):bd01/26/2022:br1.24:efr1.24:svnLENOVO:pn20NE000BMC:pvrThinkPadE495:rvnLENOVO:rn20NE000BMC:rvrNotDefined:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20NE_BU_Think_FM_ThinkPadE495:
dmi.product.family: ThinkPad E495
dmi.product.name: 20NE000BMC
dmi.product.sku: LENOVO_MT_20NE_BU_Think_FM_ThinkPad E495
dmi.product.version: ThinkPad E495
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.110-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 22.0.1-1ubuntu2.1
version.libgl1-mesa-glx: libgl1-mesa-glx 22.0.1-1ubuntu2.1
version.xserver-xorg-core: xserver-xorg-core 2:21.1.3-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-2build3
version.xserver-xorg-video-intel: xserver-xorg-video-intel N/A
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.17-2build1
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug corruption jammy kubuntu ubuntu
--
Wrong external screen resolution after wake up from sleep
https://bugs.launchpad.net/bugs/1978980
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