Today I turned on my screen and there's strange glitches on my monitor, moving the mouse or typing causes the glitches on the screen to move around.
How can I tell, how well my graphics card performs on Ubuntu?
When running vblank_mode=0 glxgears all the glitches go away, but my graphics card is screaming.
Tested on two different monitors, same outcome. Rebooted. Shutdown & ensured cables and graphic card was properly seated. No change.
DISTRIB_RELEASE=20.04
DISTRIB_CODENAME=focal
DISTRIB_DESCRIPTION="Ubuntu 20.04.5 LTS"
NAME="Ubuntu"
VERSION="20.04.5 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04.5 LTS"
VERSION_ID="20.04"
lspci | grep VGA
sudo lshw -c video
*-display
description: VGA compatible controller
product: Cypress XT [Radeon HD 5870]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=radeon latency=0
resources: irq:61 memory:d0000000-dfffffff memory:fbd20000-fbd3ffff ioport:e000(size=256) memory:c0000-dffff
My problem seems very similar to Highlight Diagonal Tears with Intel Graphics (Ubuntu 20.04) but I don't have Kernel Version: 5.8.0-55-generic:
$ ls -al /boot
total 171900
drwxr-xr-x 4 root root 4096 Sep 23 09:55 .
drwxr-xr-x 24 root root 4096 Mar 12 2022 ..
-rw-r--r-- 1 root root 262223 Aug 4 14:44 config-5.15.0-46-generic
-rw-r--r-- 1 root root 262205 Sep 1 11:43 config-5.15.0-48-generic
drwx------ 3 root root 4096 Dec 31 1969 efi
drwxr-xr-x 4 root root 4096 Sep 21 06:06 grub
lrwxrwxrwx 1 root root 28 Sep 21 06:05 initrd.img -> initrd.img-5.15.0-48-generic
-rw-r--r-- 1 root root 69786438 Sep 13 09:41 initrd.img-5.15.0-46-generic
-rw-r--r-- 1 root root 69798661 Sep 23 09:55 initrd.img-5.15.0-48-generic
lrwxrwxrwx 1 root root 28 Sep 21 06:05 initrd.img.old -> initrd.img-5.15.0-46-generic
-rw-r--r-- 1 root root 182704 Aug 18 2020 memtest86+.bin
-rw-r--r-- 1 root root 184380 Aug 18 2020 memtest86+.elf
-rw-r--r-- 1 root root 184884 Aug 18 2020 memtest86+_multiboot.bin
-rw------- 1 root root 6220961 Aug 4 14:44 System.map-5.15.0-46-generic
-rw------- 1 root root 6214413 Sep 1 11:43 System.map-5.15.0-48-generic
lrwxrwxrwx 1 root root 25 Sep 21 06:05 vmlinuz -> vmlinuz-5.15.0-48-generic
-rw------- 1 root root 11431744 Aug 4 14:47 vmlinuz-5.15.0-46-generic
-rw------- 1 root root 11445184 Sep 1 11:29 vmlinuz-5.15.0-48-generic
lrwxrwxrwx 1 root root 25 Sep 21 06:05 vmlinuz.old -> vmlinuz-5.15.0-46-generic
