It seems that a lot of GPU problems revolve around specific versions of drivers. Though AMD has their own support structure, you can often learn from information reported by others who fold.
W: GPG error: http://dl.google.com/linux/earth/deb stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 4EB27DB2A3B88B8B
E: The repository 'http://dl.google.com/linux/earth/deb stable InRelease' is not signed.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
I have found Man page 8 : apt-secure but it's somewhat over my head! I have tried a couple of fixes suggested on the Ubuntu-Mate.community but neither has worked.
I am learning a bit though. My introduction to Linux was about 20 years ago and although a Linux user ever since I haven't done much delving into the guts of the system.
The AMD driver now seems to install although it lists some "Possible missing firmware". It remains to be seen if that is a problem but I must stop for the night now.
Running the post_install script:
depmod...
update-initramfs: Generating /boot/initrd.img-5.15.0-70-generic
W: Possible missing firmware /lib/firmware/amdgpu/ip_discovery.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vega10_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/psp_13_0_10_sos.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/aldebaran_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_imu.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_rlc.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_mec.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_me.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_pfp.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_0_toc.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sdma_6_0_3.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_mes1.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi10_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_mes1.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/smu_13_0_10.bin for module amdgpu
Setting up hsa-rocr (1.7.0.50403-121~22.04) ...
Setting up libdrm2-amdgpu:amd64 (1:2.4.113.50403-1538762.22.04) ...
Setting up libelf-dev:amd64 (0.186-1build1) ...
Setting up rocm-opencl (2.0.0.50403-121~22.04) ...
Setting up g++ (4:11.2.0-1ubuntu1) ...
update-alternatives: using /usr/bin/g++ to provide /usr/bin/c++ (c++) in auto mode
Setting up libdrm-amdgpu-amdgpu1:amd64 (1:2.4.113.50403-1538762.22.04) ...
Setting up openmp-extras-runtime (15.54.0.50403-121~22.04) ...
Setting up rocm-language-runtime (5.4.3.50403-121~22.04) ...
Setting up rocm-opencl-runtime (5.4.3.50403-121~22.04) ...
update-alternatives: using /opt/rocm-5.4.3/bin/clinfo to provide /usr/bin/clinfo (clinfo) in auto mode
Processing triggers for man-db (2.10.2-1) ...
Processing triggers for libc-bin (2.35-0ubuntu3.1) ...
Is there a way of installing the missing firmware or should I roll back with Timeshift and try again?
Russell
Help please! I am getting the same, 640 x 480, VGA resolution only available on my Windows O.S. as well as Linux. I have also tried running a live session from my original installation disk. Timeshift back 10 days still only allows VGA. So it looks as if the firmware on the graphics card has been compromised.
That seems to be confirmed by an error message flashing up too quick to read Something like "AMD GPU checksum error"