Ubuntu
nvidia-graphics-drivers-455 package

  1. Bug #1905591
  2. Comment #2

Comment 2 for bug 1905591

Revision history for this message
David Evans (djve60) wrote : Re: no brightness control after update from 450 to 455

Same issue on Lenovo ThinkPat P76. Brightness control was working before.

$ uname -r
5.4.0-59-generic

$ lspci |grep -i vga
01:00.0 VGA compatible controller: NVIDIA Corporation TU104GLM [Quadro RTX 5000 Mobile / Max-Q] (rev a1)

$ sudo lshw -c video
  *-display
       description: VGA compatible controller
       product: TU104GLM [Quadro RTX 5000 Mobile / Max-Q]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:197 memory:ed000000-edffffff memory:c0000000-cfffffff memory:d0000000-d1ffffff ioport:2000(size=128) memory:ee080000-ee0fffff

Downgrade to 450 works for me too.