peter

> [torvalds/linux@f741b28](https://github.com/torvalds/linux/commit/f741b28fb299263d2d03a0fb701bfe648927cd47) introduced in 5.2 dropped the framebuffer default from 32bpp to 16bpp assuming you're running vc4-kms-v3d or vc4-fkms-v3d. > > If your text renderer is using anti-aliasing to try...

> 16bpp will be blurrier than 32bpp if using anti-aliased fonts. got it now. let try to change and test

> /sys/kernel/debug/dri/1/state my debug info for Linux raspberrypi 5.15.32-v8+ #1538 SMP PREEMPT Thu Mar 31 19:40:39 BST 2022 aarch64 GNU/Linux 2022-04-04-raspios-bullseye-arm64 ( I am going to try @6by9 solutions. I...

> You should be able to override it by adding `video=HDMI-A-1:1920x1080M-32@60` to /boot/cmdline.txt (do NOT add any carriage returns). Alter the resolution & frame rate to suit. I am going...

@6by9 my cmdline.txt: video=HDMI-A-1:1920x1080M-32@60 console=serial0,115200 console=tty1 root=PARTUUID=f3d36243-02 rootfstype=ext4 fsck.repair=yes rootwait quiet splash plymouth.ignore-serial-consoles config.txt : dtoverlay=vc4-kms-v3d or dtoverlay=vc4-fkms-v3d --- but the issue is same as before

> @popcornmix sorry, what do you mean? how I can change the config? change to video=HDMI-A-1:1920x1080M-24@60 ?

@popcornmix I tried different hdmi resolutions. both appear fuzzy.

@6by9 I'd asked in [your forum post](https://forums.raspberrypi.com/viewtopic.php?p=2018438) for a link to this display as a search only revealed a TK1560-T - you never answered. -- I did not received the...

@6by9 If you go back to your 4.19 image, then what does tvservice -s report? -- in my yocto image, pi4 hardware version 1.2. display correct. no fuzzy tvservice -s...

> Well that appears to answer your own question - run at 1280x720 60Hz. Either modify the `video=HDMI-A-1...` line if booting to the console, or use `xrandr --output HDMI-1 --mode...