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--- ubuntu:gpu:amd_gpu:setup_an_amd_video_card [2021/06/02 09:30] – peter
+++ ubuntu:gpu:amd_gpu:setup_an_amd_video_card [2021/06/02 10:27] (current) – peter
@@ Line 26: / Line 26: @@
 sudo ppa-purge ppa:oibaf/graphics-drivers
 </code>
+----
+===== Reboot =====
+Reboot the computer.
+<code bash>
+sudo reboot
+</code>
+----
+===== Check if the driver is active =====
+<code bash>
+lshw -c video
+</code>
+returns:
+<code bash>
+  *-display
+       description: VGA compatible controller
+       product: Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT]
+       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
+       physical id: 0
+       bus info: pci@0000:0b:00.0
+       version: c1
+       width: 64 bits
+       clock: 33MHz
+       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
+       configuration: driver=amdgpu latency=0
+       resources: irq:115 memory:d0000000-dfffffff memory:e0000000-e01fffff ioport:e000(size=256) memory:fcb00000-fcb7ffff memory:fcb80000-fcb9ffff
+</code>
+<WRAP info>
+**NOTE:**  Look for the keyword **driver=** in the **configuration** line.
+  * If this shows **amdgpu** then this is good; and the official GPU driver is being used.
+  * If this shows **radeon** then not good; as this indicates that the open source driver is being used.
+</WRAP>
+----
+===== Blacklist the open source radeon module driver =====
+<code bash>
+lspci -k | grep -EA3 'VGA|3D|Display'
+</code>
+displays:
+<code bash>
+</code>
+<WRAP info>
+**NOTE:**  This shows two kernel modules available: radeon and amdgpu.
+</WRAP>
+----
+===== Disable the radeon driver =====
+Edit /etc/modprobe.d/blacklist.conf:
+<code bash>
+sudo vi /etc/default/grub
+</code>
+…and add the following line at the end:
+<file bash /etc/modprobe.d/blacklist.conf>
+blacklist radeon
+</file>
+----
+===== Update grub =====
+<code bash>
+sudo update-initramfs -u
+</code>
+<WRAP important>
+**WARNING:**  If you reboot now, you might end up in a very low desktop resolution.
+</WRAP>
+===== Enable the amdgpu driver =====
+Edit the /etc/default/grub file:
+<code bash>
+sudo vi /etc/default/grub
+</code>
+...and add these lines:
+<file bash /etc/default/grub>
+GRUB_GFXMODE=1920x1080x32
+GRUB_CMDLINE_LINUX_DEFAULT="radeon.si_support=0 radeon.cik_support=0 amdgpu.si_support=1 amdgpu.cik_support=1 amdgpu.dc=1 amdgpu.dpm=1 amdgpu.modeset=1"
+</file>
+----
+===== Update Grub =====
+<code bash>
+sudo update-grub2 && sudo update-initramfs -u -k all<br>
+</code>
+----
+===== Reboot =====
+Reboot the computer.
+<code bash>
+sudo reboot
+</code>
+----
+===== References =====
+https://linuxconfig.org/amd-radeon-ubuntu-20-04-driver-installation
+https://randomblog.hu/setting-up-your-amd-video-card-in-ubuntu-20-04/