[Intel-gfx] [intel-gfx] Question about GM45, GEM and KMS

Claudio M. Camacho claudiomkd at gmail.com
Sat Feb 21 23:05:30 CET 2009


Sorry to disturb but I have been performing some tests on my GM45 and 
the status of DRI2 + GEM and I got some low-performance evidences, show 
I wanted to check here in the list.

First of all, I have a 2.6.9-rc5 with intel-2.6.1 and KMS is not 
working. Actually, the system boots perfectly, and when kdm is about to 
start, the LVDS shows a new blank screen with the console cursor on the 
top left corner but not blinking. I mean, it is like another console 
(another VT) with nothing and the cursors at the top left corner 
stopped, without blinking.

In that case, if I press Ctrl+Alt+F{1,2,3,4,5,6} I can go back to any of 
the text consoles and use my Linux box. However, when I press Alt+F7 I 
go back to that empty console with the non-blinking cursor on the top 
left corner (I guess here I should see the Xorg server running).

So, about the original question, the GEM + DRI2. I have noticed that the 
performance of my machine is quite lousy, since glxgears tops only 
350FPS (I have sometimes achieved 1200FPS using an old 2.6.27 with older 
Xorg stack). So I was wondering if everybody has this low performance 
using the GM45 or if it is just me...

I am using all the latest packages from Debian, and the versions of the 
packages are the following ones:

xserver-xorg-video-intel 2.6.1
libdrm 2.4.4+git+20090205+8b88036
mesa 7.3.0

Could you please tell me if this poor performance is due to some of the 
versions of my software installed, or is it a problem in GEM?

Furthermore, do you know anything about getting that KMS problem I have 
to work at some point?

Thank you in advance for your time.

Best regards,

Claudio M. Camacho

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