Start in on old Radeon drivers.

debugging/002-Ubuntu-20_04/08-Old-Radeon-Drivers.md

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+# Old Version of Radeon Drivers
+
+Release Date Dec 2019.
+
+https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux
+
+The link is broken, but there is a treasure trove
+of old drivers, for ubuntu and debian, at
+
+https://repo.radeon.com
+
+with GPG key to install them at
+
+```
+wget -q -O - https://repo.radeon.com/rocm/rocm.gpg.key | sudo apt-key add -
+```
+
+## AMDGPU 21.40 OOMs
+
+Installing the next most recent version of the AMDGPU driver for
+Ubuntu 20.04, the 21.40 driver, runs out of memory.
+
+I added a second 2GB stick of RAM, but it still ran out of memory,
+when compiling the DKMS.
+
+```
+sudo dpkg -i amdgpu-install-21.40.40500-1_all.deb
+```
+
+```
+sudo amdgpu-install --usecase=opencl --opencl=legacy
+```
+
+I'll try with an older AMDGPU.
+
+## AMDGPU 21.50.2
+
+```
+sudo dpkg -i amdgpu-install_21.50.2.50002-1_all.deb
+```
+
+```
+sudo amdgpu-install --usecase=opencl --opencl=rocr --no-dkms
+```
+
+Then reboot.