Access to
<filename>/dev/dri
</filename> is needed to allow 3D acceleration on video cards. It is usually simplest to add the
user who will be running X to either the
<systemitem class="groupname">video
</systemitem> or
<systemitem class="groupname">wheel
</systemitem> group. Here,
<citerefentry><refentrytitle>pw
</refentrytitle><manvolnum>8
</manvolnum></citerefentry> is used to add
user <replaceable>slurms
</replaceable> to the
<systemitem class="groupname">video
</systemitem> group, or to the
<systemitem class="groupname">wheel
</systemitem> group if there is no
<systemitem class="groupname">video
</systemitem> group: