10-23-2023, 05:08 PM
(10-17-2023, 10:10 AM)wdt Wrote: I don't know if this will help, for 4K monitors that default to 4K (added to kernel cmd line)
drm.edid_firmware=edid/your_edid.bin .... your_edid replaced by 1920x1080.bin
the edid directory is in /lib/firmware
also,,, https://wiki.archlinux.org/title/Kernel_mode_setting
BTW, often edid's have errors, usually minor
Thank you for your help wdt. Between work and my ADD I haven't been able to get back to this. On a side note I tried a Raspberry Pi 4B on the same monitor, but it would only show 640x480 (which isn't very pretty on a 34" display)- given, I was using a janky adapter. The docs say it will support 4Kp60.
So, back on track. I've been having trouble finding where I make the changes you (and the Arch Wiki) suggest. I've seen instructions for Grub, but I'm using Uboot and it must have changed since this post referencing /boot/boot.txt my /boot directory contains:
Code:
[*** ~]$ ls -l /boot/
total 35560
drwxr-xr-x 8 root root 8192 Nov 29 2022 dtbs
drwxr-xr-x 2 root root 8192 Oct 15 15:01 extlinux
-rw-r--r-- 1 root root 172032 Feb 8 2023 idbloader.img
-rw-r--r-- 1 root root 26616320 Oct 15 12:38 Image
-rw-r--r-- 1 root root 8531140 Oct 22 20:21 initramfs-linux.img
-rw-r--r-- 1 root root 1062840 Feb 8 2023 u-boot.itbAre the kernel command line instructions you offered passed onto the kernel from a config file, or compiled into the kernel itself?
Also, the EDID file I attached above (which I lost the source of) is obviously text, but you reference an edid.bin
At this point I'm fairly lost, but these display resolution problems seem to be common across the different distros and hardware (even on those geared toward the public like Twister Arbian), so any help is very much appreciated!