Public bug reported:
Graphics option in About pane shows "llvmpipe (LLVM 12.0.0, 256 bits)"
$ lspci | grep -E 'VGA|Display'
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics (rev 05)
$ glxinfo -B
name of display: :1
display: :1 screen: 0
direct rendering: Yes
Extended renderer
Thanks for the solution. I removed "nomodeset" from grub config and now
it detects external monitor.
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https://bugs.launchpad.net/bugs/1961596
Title:
Ubuntu 20.04 with kernel version