[Bug 212762] [11.0-RC2] [i915kms] OpenGL: DDS/DXT textures are rendered black, missing libtxn_dxtn-20140604 package

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=212762

--- Comment #1 from Aleksander Alekseev <afiskon at devzen.ru> ---
A few updates on this ticket.

1) Previous discussion
https://lists.freebsd.org/pipermail/freebsd-x11/2016-February/017198.html

2) Installing libtxn_dxtn-20140604.txz from here
http://ftp.rusnet.ru/FreeBSD/PKG/freebsd%3A10%3Ax86%3A64/release_3/All/ fixes a
problem. (Mirror: http://afiskon.ru/s/8b/13dfd0ba0b_libtxn_dxtn-20140604.txz )
So problem is really caused by a missing package. What happened to it? Didn't
find any corresponding records in /usr/ports/UPDATING.

3) After installing a package FPS is very low (from 10 to 40 FPS depending on
window size) and textures are rendered very weird:

http://afiskon.ru/s/6d/07d8fc8c66_textures-quality.png

I need to add user to 'video' group:

sudo pw group mod video -m eax

... and re-login or run `su eax` (since adding user to the group doesn't apply
immediately - http://unix.stackexchange.com/q/18796 ) to fix this. After this
everything renders as expected!

I strongly believe that this is a very inconvenient for users. Any chance it
could be considered a bug (a minor one)?

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