[Mageia-dev] GNOME llvmpipe rendering in gnome-session-3.6.0-2.mga3

Tue Oct 9 06:08:42 CEST 2012

zago a écrit :
+> On Mon, Oct 08, 2012 at 12:32:16PM -0400, andre999 wrote:
+>> Olav Vitters a écrit :
+>>> On Mon, Oct 08, 2012 at 02:32:24PM +0200, ovitters wrote:
+>>>> Name        : gnome-session                Relocations: (not relocatable)
+>>>> Version     : 3.6.0                             Vendor: Mageia.Org
+>>>> Release     : 2.mga3                        Build Date: Mon Oct  8 14:26:33 2012
+>>>
+>>>> ovitters <ovitters> 3.6.0-2.mga3:
+>>>> + Revision: 303504
+>>>> - add patch to unblacklist llvmpipe
+>>>
+>>> I've unblacklisted llvmpipe like Fedora has done for a few releases. In
+>>> some cases I noticed my normal driver not working (reason unknown), so
+>>> in case GNOME is sometimes slow, check if it isn't rendering using
+>>> llvmpipe.
+>>>
+>> On my system, running mga2, unblacklisting llvmpipe (so as to use
+>> regular gnome3, instead of classic/fallback mode) makes all display
+>> in regular gnome3 run extremely slow.
+
+This includes the virtual console, or scrolling in gedit, neither of 
+which has any need for accelerated display.
+
+>> It must be that llvmpipe is used for all display, even when
+>> acceleration isn't indicated.
+>
+> Hmm, that is not good. I'll test for a few days, otherwise I'll revert.
+>
+> What is reported in System Settings → Details under Graphics? llvmpipe
+> or something else?
+
+It says
+"Carte graphique  Gallium 0.4 on llvmpipe (LLVM 0x300)"
+
+Strangely enough, I have now uninstalled llvmpipe and am running gnome3 
+in fallback/classic mode.
+But it said the same thing before uninstalling.
+I guess that the message is only set/reset under regular gnome.
+I don't think classic mode was slow with llvmpipe installed, but 
+uninstalled it since llvmpipe was in the libllvm-devel package (version 
+3.0 on mga2), which is huge (1 G in size).
+The equivalent package on fedora is apparently llvm-devel.
+(I uninstalled it to leave more space on /.)
+>
+>> BTW, regular gnome3 might well be called "tablet mode".  A lot of
+>> extensions have been developped to revert to a display more like
+>> gnome2.
+>
+> I am not using a tablet and suggest you first try it on a tablet.
+>
+My wife has a tablet-like android computer.  The default regular gnome3 
+has the same appearance (and awkwardness to quickly access applications).
+Sorry, but don't have access to a tablet powerful enough to run gnome3.
+I looked at a number of extensions, and it was surprising how many were 
+oriented to bringing back a more gnome2-like (and/or less tablet-like) 
+appearance.
+So there are already solutions for most of the appearance problems. 
+(And if necessary, I'll modify some to regain a convenient environment.)
+
+I'm surprised at the performance problems of llvmpipe.  Although my cpu 
+is 32-bit and 64-bit is recommended, it does have the recommended sse2 
+function.
+See http://www.mesa3d.org/llvmpipe.html
+
+(It has taken me ages to get gnome3 -- classic -- in a usable state.
+Next to regain access to svn.)
+
+-- 
+André
+