systemd (udev) wants group 'render'

[bdubbs@…]

In version 236 NEWS:

The "uaccess" udev tag has been dropped from /dev/kvm and /dev/dri/renderD*. These devices now have the 0666 permissions by default (but this may be changed at build-time). /dev/dri/renderD* will now be owned by the "render" group along with /dev/kfd.

The group name can be changed by updating the rule in /lib/udev/rules.d/50-udev-default.rules or before install, rules/50-udev-default.rules.in.

SUBSYSTEM=="drm", KERNEL=="renderD*", GROUP="render", MODE="@GROUP_RENDER_MODE@" SUBSYSTEM=="kfd", GROUP="render", MODE="@GROUP_RENDER_MODE@

I do not see a need for a separate group as the default permissions are 0666. If the assigned group is not available, then the group remains at the default: root.

Perhaps we should just remove the GROUP="render" assignment.

Note that /dev/dri/renderD* appears to be used by a video driver. See ​https://ffmpeg.org/pipermail/ffmpeg-user/2016-November/034445.html

[bdubbs@…]

Fixed at revision 11339.