Greg Woods composed on 2024-06-06 11:26 (UTC-0600):
Michal Schorm wrote:
If the Full HD resolution isn't working well in your setup, you may
try to force a lower resolution by trying out 'video=1024x768' or 'vga=0x318' kernel parameters.
I have tried a couple of different vga values but it has no apparent effect; I probably just haven't hit on the right one yet. I was kind of hoping someone here would have already seen this problem and have some specific values to try. Once the current system-upgrade that is in progress finishes, I'll try the ones you list here.
Any valid vga= applied lasts only until a module providing working KMS loads. Once KMS engages, the kernel decides the mode, unless a differing supported video= mode has been applied. If KMS engages early enough, the effect of vga= may never be seen.
Using video= with a suitable value does normally change the mode if KMS is working, and with an appropriate mode, output fitting the available screen space should result. On a 1920x1080, try actually specifying 1920x1080. If that doesn't help, others to try include: 1600x900, 1280x768, 1152x854 & 1024x768. @60 or an alternate refresh rate may be appended to the video= mode, and may make a difference.