Re: Logging in/out on console while logged in in X removes hardware acceleration

I'm not sure what can be done about it.

/etc/fbtab's first role is to give access to subsystems, but it's
second more important role is to *take them away* later.

Unfortunately there is nothing "keeping state" about previous access
conditions, as well it is quite unclear if reverting to previous access
conditions would be a safe choice.


=?UTF-8?Q?Nils_Reu=c3=9fe?= <n.reusse@hxgn.net> wrote:

> Dear all,
>
> logging in and out changes the owner of the /dev/drm0 file, so that one
> loses hardware acceleration in X when additionally logging in and out on
> a console. Here's what I do:
>
> 1) Boot Openbsd and log into X with xenodm. Ownership of /dev/drm0:
>
> $ ls -l /dev/drm0
> crw------- 1 nils wheel 87, 0 Jul 31 13:07 /dev/drm0
>
> 2) Switch to a console (e.g. CTRL-ALT-F1) and log in with the same user.
> The file is now owned by my user-group:
>
> $ ls -l /dev/drm0
> crw------- 1 nils nils 87, 0 Jul 31 13:07 /dev/drm0
>
> 3) Log out from the console. Ownership changes back to root/wheel,
> thereby disabling hardware acceleration in X:
>
> $ ls -l /dev/drm0
> crw------- 1 root wheel 87, 0 Jul 31 13:07 /dev/drm0
>
> To regain hardware acceleration, I have to manually chown the file back
> to my userid, or relogin with xenodm. So I guess logging in chowns the
> file with my user (even with my user group when logging in via console),
> and logging out reassigns the file owner to root.
>
> I guess not much can be done about this, or can it?
>
> Nils
>