Similar issue here:
I was using kernel 5.4.0.42.46 with nvidia-drivers-440, installed 5.8.3,
booted into the new kernel and the graphics were way worse. Software &
Updates still has the radio button selected for nvidia,
see attached, this looked terrible stretched across a 3440*1440 screen.
but:
hwinfo --gfxcard
Driver Info #0:
Driver Status: nvidiafb is not active
Driver Activation Cmd: "modprobe nvidiafb"
Driver Info #1:
Driver Status: nouveau is not active
Driver Activation Cmd: "modprobe nouveau"
Config Status: cfg=new, avail=yes, need=no, active=unknown
Then, Selected nouveau driver, apply, hwinfo says both drivers still
inactive, restarted, looks good (hi res), nvidia settings absent from
start menu settings, nouveau radio button highlit in software & updates,
hwinfo --gfxcard
Driver Info #0:
Driver Status: nvidiafb is not active
Driver Activation Cmd: "modprobe nvidiafb"
Driver Info #1:
Driver Status: nouveau is active
Driver Activation Cmd: "modprobe nouveau"
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #7 (PCI bridge)
So nouveau is being used, graphics problem fixed, nvidia definitely the
culprit of the graphics issues which had been plaguing me for about a
year. I'll file a bug with them, however part of what took me so long to
diagnose this was that I thought the nouveau drivers were broken since I
could only get 1024*768. I spent hours trying to fix that, to no avail.
Turns out there was nothing wrong with them, they just weren't selected.
I didn't know this because I didn't think to check, I just believed the
radio button. Feasibly the selected item is highlit until changed in the
GUI or backend by the user, but it doesn't do an internal check (hwinfo
or otherwise) to confirm that the driver it thinks is selected, is
selected?
Thanks
** Attachment added: "screenshot"
https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1528422/+attachment/5405908/+files/Kernel5.8.3.NolagLowResMoreDeets.png
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https://bugs.launchpad.net/bugs/1528422
Title:
Additional drivers reports the wrong driver in use
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