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
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