Gentoo Archives: gentoo-user

From: walt <w41ter@×××××.com>
To: gentoo-user@l.g.o
Subject: [gentoo-user] Re: Virtualbox-guest-additions-4.3.24 breaks 3D acceleration in linux guests (?)
Date: Fri, 06 Mar 2015 00:27:47
Message-Id: mdas9e$20j$
In Reply to: [gentoo-user] Virtualbox-guest-additions-4.3.24 breaks 3D acceleration in linux guests (?) by walt
1 On 03/05/2015 02:25 PM, walt wrote:
2 > Downgrading Virtualbox to 4.3.20-r1 fixes the problem on one ~amd64
3 > machine but, of course, not the other one <sigh>.
5 For reasons I don't know, the gentoo devs split the "guest-additions"
6 into two parts: they put the vboxvideo kernel module into the gentoo
7 xf86-video-virtualbox package, and the vboxguest+vboxsf kernel modules
8 into the virtualbox-guest-additions package.
10 Anyway, starting with a vbox gentoo snapshot from Mar 3 (before the
11 update to vbox-4.3.24) I upgraded only the virtualbox-guest-additions
12 (not the xf86-video-virtualbox package) and found that everything still
13 works normally.
15 I then upgraded the xf86-video-virtualbox package and discovered that
16 3D video acceleration was broken, just as before.
18 I then downgraded the xf86-video-virtualbox package to 4.3.20 (leaving
19 the virtualbox-guest-additions at 4.3.24) and found the 3D acceleration
20 working normally again.
22 That clearly implicates the vboxvideo.ko kernel module as the cause of
23 the breakage, I think.
25 Opinions/comments are most welcome.