Garbled screen in Xfce; works in Cinnamon but too heavy

[athulmathewzzz]

I am having a really bad problem
When I install an ubuntu based linux distro (specifically xfce) including linux mint, The operating system is not letting me choose the correct resolution of my screen.
When I choose my original screen resolution in Display Settings. It is turning my screen into this:

Originally My screen resolution is 1366X766. But Now I can only set my screen resolution to 1280X720
Every versions are giving me the same problem.
I am having this problem with MATE and XFCE but I don't have this problem when I am using Cinnamon
But Cinnamon is heavy for my stupid computer. I want to switch to xfce but I can't because of this problem.
I can but I also have a second monitor so it makes things more complicated. When I connect my second monitor it is not even letting me choose 1280X720. Is there any way to fix it

[SMG]

Welcome to the forum, athulmathewzzz.

When I install an ubuntu based linux distro (specifically xfce) including linux mint, The operating system is not letting me choose the correct resolution of my screen.
When I choose my original screen resolution in Display Settings. It is turning my screen into this:

It is a combination of the windows manager/compositor and a bug in amdgpu. Here is a long thread with others having the same issue and what they tried 20.04 Display issues with AMD GPU (on MATE and Xfce).

This post indicates using compton (instead of the default marco) with LM20.1 MATE works.

I do not know what options you have available in Xfce, but try some of the other options to see if one will work..

[absque fenestris]

In that case I would install Cinnamon --- you can't do anything with freaky graphics ...

As always with questions about hardware: post the full output of the terminal command inxi -Fxz.

[athulmathewzzz]

System:
Kernel: 5.4.0-72-generic x86_64 bits: 64 compiler: gcc v: 9.3.0
Desktop: Xfce 4.14.2 Distro: Ubuntu 20.04.2 LTS (Focal Fossa)
Machine:
Type: Laptop System: HP product: HP Laptop 15-bw0xx
v: Type1ProductConfigId serial: <filter>
Mobo: HP model: 8330 v: 27.32 serial: <filter> UEFI: Insyde v: F.23
date: 04/03/2018
Battery:
ID-1: BAT1 charge: 15.8 Wh condition: 33.5/41.4 Wh (81%)
model: Hewlett-Packard PABAS0241231 status: Discharging
Device-1: hidpp_battery_0 model: Logitech Wireless Keyboard K230
charge: 100% (should be ignored) status: Discharging
CPU:
Topology: Dual Core model: AMD E2-9000e RADEON R2 4 COMPUTE CORES 2C+2G
bits: 64 type: MCP arch: Excavator L2 cache: 1024 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm
bogomips: 5988
Speed: 1096 MHz min/max: 1100/1500 MHz Core speeds (MHz): 1: 1095 2: 1095
Graphics:
Device-1: AMD Stoney [Radeon R2/R3/R4/R5 Graphics] vendor: Hewlett-Packard
driver: amdgpu v: kernel bus ID: 00:01.0
Display: x11 server: X.Org 1.20.9 driver: amdgpu,ati
unloaded: fbdev,modesetting,vesa resolution: 1280x720~60Hz
OpenGL: renderer: AMD STONEY (DRM 3.35.0 5.4.0-72-generic LLVM 11.0.0)
v: 4.5 Mesa 20.2.6 direct render: Yes
Audio:
Device-1: AMD vendor: Hewlett-Packard driver: snd_hda_intel v: kernel
bus ID: 00:01.1
Device-2: AMD Family 15h Audio vendor: Hewlett-Packard
driver: snd_hda_intel v: kernel bus ID: 00:09.2
Sound Server: ALSA v: k5.4.0-72-generic
Network:
Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
vendor: Hewlett-Packard driver: r8169 v: kernel port: 3000 bus ID: 02:00.0
IF: enp2s0 state: down mac: <filter>
Device-2: Realtek RTL8723DE 802.11b/g/n PCIe Adapter
vendor: Hewlett-Packard driver: rtw_pci v: N/A port: 2000 bus ID: 03:00.0
IF: wlp3s0 state: up mac: <filter>
Drives:
Local Storage: total: 931.51 GiB used: 7.90 GiB (0.8%)
ID-1: /dev/sda vendor: Western Digital model: WD10JPVX-60JC3T1
size: 931.51 GiB
Partition:
ID-1: / size: 915.40 GiB used: 7.89 GiB (0.9%) fs: ext4 dev: /dev/sda2
Sensors:
System Temperatures: cpu: 49.1 C mobo: 20.0 C gpu: amdgpu temp: 49 C
Fan Speeds (RPM): N/A
Info:
Processes: 171 Uptime: 24m Memory: 3.73 GiB used: 1.11 GiB (29.6%)
Init: systemd runlevel: 5 Compilers: gcc: N/A Shell: bash v: 5.0.17
inxi: 3.0.38

[athulmathewzzz]

There is no problem when I switch it to lower resolution.
But When i try to connect another monitor it messes up again

[athulmathewzzz]

There is two ways to solve this problem that I found online:
One is to run this command in command line:
xfconf-query -c xfwm4 -p /general/vblank_mode -t string -s "glx" --create
https://www.reddit.com/r/xubuntu/commen ... splay_fix/
or you can change the compositor to compton

according to what I read online it was an amd driver issue.

[SMG]

There is two ways to solve this problem that I found online:
One is to run this command in command line:
xfconf-query -c xfwm4 -p /general/vblank_mode -t string -s "glx" --create
https://www.reddit.com/r/xubuntu/commen ... splay_fix/
or you can change the compositor to compton

according to what I read online it was an amd driver issue.

So you are telling us what you found online matces the information you were given earlier in this thread.

It is a combination of the windows manager/compositor and a bug in amdgpu. Here is a long thread with others having the same issue and what they tried 20.04 Display issues with AMD GPU (on MATE and Xfce).

This post indicates using compton (instead of the default marco) with LM20.1 MATE works.

I do not know what options you have available in Xfce, but try some of the other options to see if one will work..