'Kwin direct rendering disabled on ATI'

[prev in list] [next in list] [prev in thread] [next in thread] 

List:       kde-devel
Subject:    Kwin direct rendering disabled on ATI
From:       Bogdan Maxim <hazica () googlemail ! com>
Date:       2011-03-31 10:22:28
Message-ID: 201103311222.28910.bm () ancud ! de
[Download RAW message or body]

[Attachment #2 (multipart/alternative)]

Hello everyone,

I am experiencing a very dubious issue with Kwin/KDE, namely: I have had 
inconsistent performance when Desktop effects are enabled (Sometimes they are 
smooth, when not a lot of apps are running. After the system has been running 
for a while and a lot of programs are open, the effects get choppy and rather 
annoying). What I have discovered recently though is this: glxinfo tells me 
that direct rendering is actually enabled, so X is able to do direct 
rendering.

If i go for a kwin --replace though, i get this info output: 
http://pastebin.com/3jP186C5

As you can see, it is quite clear that kwin has no direct rendering available. 
So now, the question is why? Compiz works perfectly, so it most probably uses 
hardware acceleration. Now, I have also had a look in KInfoCenter, at the 
openGL info and found out that it doesn't really know a lot about the graphics 
adapter either, as visible here: http://img22.imageshack.us/i/kinfocenter.png/

I have not been able to find anything on the web except a russian post in a 
kubuntu forum, which, google-translated, gave me some really good giggles, but 
they didn't have a solution either.

So the question is, how do I go about debugging the issue?

INFO: Kubuntu 10.10, kde 4.6.1, ATI Mobility Radeon 4650, using ATI 
proprietary driver, installed manually. Xorg.0.log is clean.

Thank you.

[Attachment #5 (text/html)]

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0//EN" \
"http://www.w3.org/TR/REC-html40/strict.dtd"> <html><head><meta name="qrichtext" \
content="1" /><style type="text/css"> p, li { white-space: pre-wrap; }
</style></head><body style=" font-family:'Ubuntu'; font-size:8pt; font-weight:400; \
font-style:normal;"> <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; \
margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">Hello \
everyone,</p> <p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; \
margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;">	</p> <p \
style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;">I am experiencing a very \
dubious issue with Kwin/KDE, namely: I have had inconsistent performance when Desktop \
effects are enabled (Sometimes they are smooth, when <span style=" \
font-weight:600;">not</span> a lot of apps are running. After the system has been \
running for a while and a lot of programs are open, the effects get choppy and rather \
annoying). What I have discovered recently though is this: <span style=" \
font-weight:600;">glxinfo</span> tells me that direct rendering is actually enabled, \
so X is able to do direct rendering.</p> <p style="-qt-paragraph-type:empty; \
margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br /></p> <p style=" \
margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;">If i go for a kwin --replace \
though, i get this info output: http://pastebin.com/3jP186C5</p> <p \
style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; \
margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br /></p> \
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;">As you can see, it is quite \
clear that kwin has no direct rendering available. So now, the question is why? \
Compiz works perfectly, so it most probably uses hardware acceleration. Now, I have \
also had a look in KInfoCenter, at the openGL info and found out that it doesn't \
really know a lot about the graphics adapter either, as visible here: \
http://img22.imageshack.us/i/kinfocenter.png/</p> <p style="-qt-paragraph-type:empty; \
margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br /></p> <p style=" \
margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;">I have not been able to find \
anything on the web except a russian post in a kubuntu forum, which, \
google-translated, gave me some really good giggles, but they didn't have a solution \
either.</p> <p style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; \
margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; \
-qt-user-state:0;"><br /></p> <p style=" margin-top:0px; margin-bottom:0px; \
margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px; \
-qt-user-state:0;">So the question is, how do I go about debugging the issue?</p> <p \
style="-qt-paragraph-type:empty; margin-top:0px; margin-bottom:0px; margin-left:0px; \
margin-right:0px; -qt-block-indent:0; text-indent:0px; -qt-user-state:0;"><br /></p> \
<p style=" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; \
-qt-block-indent:0; text-indent:0px; -qt-user-state:0;">INFO: Kubuntu 10.10, kde \
4.6.1, ATI Mobility Radeon 4650, using ATI proprietary driver, installed manually. \
Xorg.0.log is clean.</p> <p style="-qt-paragraph-type:empty; margin-top:0px; \
margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; \
text-indent:0px; -qt-user-state:0;"><br /></p> <p style=" margin-top:0px; \
margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; \
text-indent:0px; -qt-user-state:0;">Thank you.</p></body></html>

>> Visit http://mail.kde.org/mailman/listinfo/kde-devel#unsub to unsubscribe <<

[prev in list] [next in list] [prev in thread] [next in thread] 