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I'm currently (in Ubuntu 20.04) stuck with this low resolution: 640x480 59.94*, 
what I want to have is the monitor specs: 1080p and 144 Hz. This problem 
appeared after plugging in my old monitor after 2 years again, it's a philips 
272g.  Things that I unsuccesfully tried to get a proper resolution:
-Use different GPUs from different vendors: 1050 ti and 5700 xt. Use different 
drivers: propritary and open source
-Change resolution via xrandr addmode/newmode (leads to "no signal" from 
monitor)
-Using "GRUB_GFXMODE" config in grub (no change)
-Searching through logs, only useleful thing I found was in the Xorg log:
[    12.117] (II) AMDGPU(0): EDID for output DisplayPort-0
[    12.117] (II) AMDGPU(0): Printing probed modes for output DisplayPort-0
[    12.117] (II) AMDGPU(0): Modeline "640x480"x59.9   25.18  640 656 752 800  
480 490 492 525 -hsync -vsync (31.5 kHz e)
-In Windows the resolution works fine
-Both GPUs work fine with a different monitor
I'm not sure how to proceed here nor do I know where the problem lies. I assume 
this to be a bug in Ubuntu because a bunch of different GPUs/drivers lead to 
this problem making it unlikely to be a driver problem.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
Uname: Linux 5.4.0-050400-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CasperMD5CheckResult: skip
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Mon May 18 22:16:58 2020
DistUpgraded: 2020-05-09 15:39:17,760 ERROR got error from PostInstallScript 
./xorg_fix_proprietary.py (g-exec-error-quark: Failed to execute child process 
“./xorg_fix_proprietary.py” (No such file or directory) (8))
DistroCodename: focal
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 
5700/5700 XT] [1002:731f] (rev c1) (prog-if 00 [VGA controller])
   Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon RX 5600 
OEM/5600 XT / 5700/5700 XT] [1002:0b36]
InstallationDate: Installed on 2019-11-26 (173 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
MachineType: Micro-Star International Co., Ltd. MS-7A34
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-050400-generic 
root=UUID=f3ec722e-f50e-43cf-8e55-3cbdb22a0592 ro drm.debug=0xe plymouth:debug
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to focal on 2020-05-09 (9 days ago)
dmi.bios.date: 11/29/2019
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: A.LQ
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: B350 PC MATE (MS-7A34)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 2.0
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 2.0
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrA.LQ:bd11/29/2019:svnMicro-StarInternationalCo.,Ltd.:pnMS-7A34:pvr2.0:rvnMicro-StarInternationalCo.,Ltd.:rnB350PCMATE(MS-7A34):rvr2.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr2.0:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: MS-7A34
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 2.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.101+git2005070630.c997ba~oibaf~f
version.libgl1-mesa-dri: libgl1-mesa-dri 20.2~git2005181337.b5accb~oibaf~f
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1
xserver.bootTime: Tue Nov 26 22:01:15 2019
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.20.5+git20191008-0ubuntu1

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal resolution third-party-packages ubuntu
-- 
Proper monitor resolution/refresh rate not available
https://bugs.launchpad.net/bugs/1879402
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