I am using a Lenovo Yoga C940 15" with Fedora 34. It has a 4K screen with an nvidia gtx1650 mobile card and integrated intel graphics. I wanted to change the resolution of the GRUB menu because it is tiny in the native 4K resolution, and I tried editing /etc/default/grub and changing the GRUB_GFXMODE to something like 1920x1080, then generating the grub config and updating grub, but nothing seems to work. I installed hwinfo so that I could see the resolutions supported by the framebuffer, but when I run hwinfo --framebuffer, no output appears. Redirecting it to a log file using --log with hwinfo gives a large text file but absolutely no information about display resolutions supported. What is going on here? Does my laptop hardware not support the framebuffer for some reason? When using dmesg | grep -i 'frame.*buffer', I get the following output:
[ 1.770472] efifb: framebuffer at 0x4000000000, using 32400k, total 32400k [ 1.770513] fb0: EFI VGA frame buffer device [ 3.880879] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device [ 5.260159] i915 0000:00:02.0: [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.
which indicates that a framebuffer is supported. What I don’t understand is why I can’t seem to change the resolution of the GRUB bootloader and why hwinfo doesn’t display any resolution information about the framebuffer. Any help is appreciated.
2 Likes