[SOLVED] Incorrect Permissions of dev/vchiq on linux-rpi 6.1

[robg]

After upgrading my RPI to linux-rpi 6.1.10-2, commands and programs that interface with the VideoCore processor (e.g., vcgencmd and Mathematica) do no longer work. This is due to incorrect permissions of /dev/vchiq:
$this->bbcode_second_pass_code('', '
On the 5.15 kernel, `stat /dev/vchiq` lists 0660 / uid root / gid video.
On the 6.1 kernel, `stat /dev/vchiq` lists 0600 / uid root / gid root.
')
Can anyone else confirm this? If I find that more people encountered this regression, I will file a bug report upstream.

Appendum: This has been resolved with raspberrypi-firmware 20230124-2. Many thanks to graysky!

[graysky]

I see the issue. The udev rule provided by raspberrypi-firmware needs to be adjusted. I will fix.

[robg]

Thanks for the quick reply and the incoming fix!