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<H1>[Mageia-dev] GNOME llvmpipe rendering in gnome-session-3.6.0-2.mga3</H1>
<B>Olav Vitters</B>
<A HREF="mailto:mageia-dev%40mageia.org?Subject=Re%3A%20%5BMageia-dev%5D%20GNOME%20llvmpipe%20rendering%20in%0A%20gnome-session-3.6.0-2.mga3&In-Reply-To=%3C20121009133927.GA32503%40bkor.dhs.org%3E"
TITLE="[Mageia-dev] GNOME llvmpipe rendering in gnome-session-3.6.0-2.mga3">olav at vitters.nl
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<I>Tue Oct 9 15:39:27 CEST 2012</I>
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<PRE>On Tue, Oct 09, 2012 at 12:08:42AM -0400, andre999 wrote:
><i> zago a écrit :
</I>><i> >On Mon, Oct 08, 2012 at 12:32:16PM -0400, andre999 wrote:
</I>><i> >>Olav Vitters a écrit :
</I>><i> >>>On Mon, Oct 08, 2012 at 02:32:24PM +0200, ovitters wrote:
</I>><i> >>>>Name : gnome-session Relocations: (not relocatable)
</I>><i> >>>>Version : 3.6.0 Vendor: Mageia.Org
</I>><i> >>>>Release : 2.mga3 Build Date: Mon Oct 8 14:26:33 2012
</I>><i> >>>
</I>><i> >>>>ovitters <ovitters> 3.6.0-2.mga3:
</I>><i> >>>>+ Revision: 303504
</I>><i> >>>>- add patch to unblacklist llvmpipe
</I>><i> >>>
</I>><i> >>>I've unblacklisted llvmpipe like Fedora has done for a few releases. In
</I>><i> >>>some cases I noticed my normal driver not working (reason unknown), so
</I>><i> >>>in case GNOME is sometimes slow, check if it isn't rendering using
</I>><i> >>>llvmpipe.
</I>><i> >>>
</I>><i> >>On my system, running mga2, unblacklisting llvmpipe (so as to use
</I>><i> >>regular gnome3, instead of classic/fallback mode) makes all display
</I>><i> >>in regular gnome3 run extremely slow.
</I>><i>
</I>><i> This includes the virtual console, or scrolling in gedit, neither of
</I>><i> which has any need for accelerated display.
</I>><i>
</I>><i> >>It must be that llvmpipe is used for all display, even when
</I>><i> >>acceleration isn't indicated.
</I>><i> >
</I>><i> >Hmm, that is not good. I'll test for a few days, otherwise I'll revert.
</I>><i> >
</I>><i> >What is reported in System Settings → Details under Graphics? llvmpipe
</I>><i> >or something else?
</I>><i>
</I>><i> It says
</I>><i> "Carte graphique Gallium 0.4 on llvmpipe (LLVM 0x300)"
</I>><i>
</I>><i> Strangely enough, I have now uninstalled llvmpipe and am running
</I>><i> gnome3 in fallback/classic mode.
</I>><i> But it said the same thing before uninstalling.
</I>><i> I guess that the message is only set/reset under regular gnome.
</I>><i> I don't think classic mode was slow with llvmpipe installed, but
</I>><i> uninstalled it since llvmpipe was in the libllvm-devel package
</I>><i> (version 3.0 on mga2), which is huge (1 G in size).
</I>><i> The equivalent package on fedora is apparently llvm-devel.
</I>><i> (I uninstalled it to leave more space on /.)
</I>
So it seems to be using llvmpipe eventhough better methods are
available. That is not what is supposed to be done :-(
I'll check, otherwise I'll revert for now.
><i> >
</I>><i> >>BTW, regular gnome3 might well be called "tablet mode". A lot of
</I>><i> >>extensions have been developped to revert to a display more like
</I>><i> >>gnome2.
</I>><i> >
</I>><i> >I am not using a tablet and suggest you first try it on a tablet.
</I>><i> >
</I>><i> My wife has a tablet-like android computer. The default regular
</I>><i> gnome3 has the same appearance (and awkwardness to quickly access
</I>><i> applications).
</I>><i> Sorry, but don't have access to a tablet powerful enough to run gnome3.
</I>><i> I looked at a number of extensions, and it was surprising how many
</I>><i> were oriented to bringing back a more gnome2-like (and/or less
</I>><i> tablet-like) appearance.
</I>
Judging based on appearance is not enough. One example: On a tablet
computer you rely completely on the on screen keyboard. The on screen
keyboard in GNOME 3 cannot be relied upon. A really reliable on screen
keyboard would be great for accessibility reasons...
Now if you really use a touch interface, you'll indeed have the same
thing with GNOME 3 as with e.g. Android. But with either a mouse of a
keyboard I don't see any difficulties. Obviously it works differently,
but I have an Android phone and use GNOME 3 and the experience is not
the same. There is more to it than showing applications as icons in a
grid.
><i> So there are already solutions for most of the appearance problems.
</I>><i> (And if necessary, I'll modify some to regain a convenient
</I>><i> environment.)
</I>
GNOME 3 allows for way more customizations than ever before.
><i> I'm surprised at the performance problems of llvmpipe. Although my
</I>><i> cpu is 32-bit and 64-bit is recommended, it does have the
</I>><i> recommended sse2 function.
</I>><i> See <A HREF="http://www.mesa3d.org/llvmpipe.html">http://www.mesa3d.org/llvmpipe.html</A>
</I>><i>
</I>><i> (It has taken me ages to get gnome3 -- classic -- in a usable state.
</I>><i> Next to regain access to svn.)
</I>
I tried it under Fedora and it was not slow. Currently we're long away
from a stable release so IMO it is the right time for some testing, but
it should at least not use llvmpipe when something better is available.
--
Regards,
Olav
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