On 08/04/12 11:19, Bruce Dubbs wrote:
> Ken Moffat wrote:
>> On Sat, Apr 07, 2012 at 07:23:44PM -0500, Bruce Dubbs wrote:
>>> In mesa, I see three places that use card0. They are all of the form
>>> fd = open("/dev/dri/card0", O_RDWR);
>>>
>>> I see in rules.d/50-udev-default.rules an entry
>>> SUBSYSTEM=="drm", GROUP="video"
>>>
>>> The default udev permissions is 0660. I think a rule in 55-lfs.rules like:
>>>
>>> SUBSYSTEM=="drm", MODE="0666"
>>>
>>> may work.
>
>> OK, so it's udev rather than Mesa that determines the group name.
>> But, in all current LFS builds we *don't* have such a rule. To me,
>> it seems more reliable to add users to the video group. After all,
>> we've defined that group for a long time.
>
> That's true. I suspect either way will work. The problem with the
> group is that each user has to be added to that group while the udev
> rule makes hw acceleration available for all users at one time. Of
> course in most cases there is only one user. :)
>
> -- Bruce
>
>
I personally don't like the idea of giving access to everyone which
would include the user nobody and other 'guest' type users.
Wayne.
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