Talk:Video Driver and OpenGL Troubleshooting in Linux

$ sudo lshw -C video
 *-display                 
      description: VGA compatible controller
      product: Trinity [Radeon HD 7560D]
      vendor: Advanced Micro Devices, Inc. [AMD/ATI]
      physical id: 1
      bus info: pci@0000:00:01.0
      version: 00
      width: 32 bits
      clock: 33MHz
      capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
      configuration: driver=radeon latency=0
      resources: irq:38 memory:d0000000-dfffffff ioport:f000(size=256) memory:feb00000-feb3ffff memory:c0000-dffff

Command modinfo i915

modinfo i915

A8-5500 with Radeon™ HD 7560D Drivers & Support

Downloaded from here:

• https://www.amd.com/en/support/apu/amd-series-processors/amd-a8-series-apu-for-desktops/a8-5500-radeon-hd-7560d

How to install on Ubuntu

• https://linuxconfig.org/how-to-install-the-latest-amd-radeon-drivers-on-ubuntu-18-04-bionic-beaver-linux

Read this and try to make sense of it....

• amd-catalyst-graphics-driver-installer-notes-for-linux-operating-systems.pdf

In Linux, there is two parts for the video driver, the kernel part and the X server part.

1. Let's identify your hardware first. By typing lspci | grep VGA in a terminal, you should see a line with you graphic card description (even if not configured at all).
2. Let's check the correct kernel driver is loaded find /dev -group video.
3. Let's check the correct X driver is loaded glxinfo | grep -i vendor.

If you want more help, I would like the result of following commands: (Remember, never trust command line that people ask you to execute without knowing what it does.)

lspci | grep VGA
lsmod | grep "kms\|drm"
find /dev -group video
cat /proc/cmdline
find /etc/modprobe.d/
cat /etc/modprobe.d/*kms*
ls /etc/X11/xorg.conf
glxinfo | grep -i "vendor\|rendering"
grep LoadModule /var/log/Xorg.0.log

run

lspci -k | grep -EA3 'VGA|3D|Display'

Example:

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 530 (rev 06)
    Subsystem: ASUSTeK Computer Inc. HD Graphics 530
    Kernel driver in use: i915
    Kernel modules: i915
--
01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 950M] (rev a2)
    Subsystem: ASUSTeK Computer Inc. GM107M [GeForce GTX 950M]
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nouveau, nvidia_375_drm, nvidia_375

This command will show all video PCI devices and kernel modules installed and in use.

Only VGA is not good enough, because Nvidia mobile adapters are shown as 3D and some AMD adapters are shown as Display.

see what Xorg is currently using:

egrep -i " connected|card detect|primary dev|Setting driver" /var/log/Xorg.0.log