Re: niri-25.11.20260220 crashes: "couldn't find GPU"

On 2/25/26 19:29, Tobias Heider wrote:
> On Wed, Feb 25, 2026 at 06:03:50PM +0000, David Goudou wrote:
>> niri package pulls in seatd, do you have it running and are you in the _seatd
>> group?
>>
>> As of 25.11.20260220, you shouldn't need to set render-drm-device
>>
>> On Wed, 25 Feb 2026, 17:42 Christoph Liebender, <[1]christoph@liebender.dev>
>> wrote:
>>
>> Hi ports@, Tobias,
>>
>> when trying to startniri.sh from vt0, it crashes for me with the
>> attached error. (Specifying render-drm-device as it was suggested in the
>> pkg-readme causes niri not to start at all, as I reported in the initial
>> import thread already.)
>>
>> I wonder, is there any other steps involved to get niri running? Do I
>> need seatd, greetd, or anything like that? Or _should_ it just be a
>> "raw" login to vt0 with startniri.sh? Because that's what I am trying.
>>
>> - christoph
>>
>>
>> References:
>>
>> [1] mailto:christoph@liebender.dev
>
> In my experience not starting seatd means your input won't work but
> I haven't previously seen any gpu detection errors. I guess your user
> has to have access to the devices in /dev/dri so maybe check the
> permissions.
>
> The latest version of the port (25.11.20260220) has an updated rust
> drm crate and shouldn't require the render-drm-device hack anymore.
>
> Does gpu acceleration work on your machine in other applications?
> Which GPU are you using?
>

Thanks for the hints!! After some more trial and error, I got it
working. In the end, seatd/greetd didn't do the trick for me, and
apparently, it can work without anyway.

All I needed was to add this line to /etc/fbtab:

/dev/ttyC0 0600
/dev/wskbd0:/dev/wsmouse[01]:/dev/dri/card0:/dev/dri/renderD128

for the correct permissions - I hope that this does not introduce any
unwanted "security side-effects"? I can now startniri.sh on vt0.
(wsmouse1 for thinkpad nipple control.)

I wonder though, what would be the greetd setup?

rcctl enable seatd greetd
usermod -G _seatd _greetd
usermod -G _seatd $(whoami)
sed -i 's|agreety --cmd /bin/sh|agreety --cmd startniri.sh|' \
/etc/greetd/config.toml
reboot

... because that's what I did, and inputs would not work. Albeit without
any changes to fbtab. So what's the point?

To answer your question Tobias, my GPU is an Intel UHD Graphics 620.