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

[andre999]

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