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#1 2011-12-09 13:41:43

tomahhunt
Member
Registered: 2011-10-21
Posts: 8

Slow 2D Acceleration with radeon and nouveau driver

I am using a bit of an odd setup.

I have an ATI graphics card and an Nvidia graphics card.

lspci | grep VGA
01:00.0 VGA compatible controller: ATI Technologies Inc RV620 LE [Radeon HD 3450]
05:00.0 VGA compatible controller: nVidia Corporation GT218 [GeForce 8400 GS] (rev a2)

Each Graphics card has two monitors attached. I am using latest open source radeon and and nouveau driver.

I have managed to get all 4 monitors working as a big desktop. Using the following.

Xorg.conf: http://pastebin.com/xFY2aVJX
Xorg.log: http://pastebin.com/T3DuLzzt

This uses zaphod mode which is the only way I could get it to work.

In this setup:
I can run glxgears on Monitor 1 only.
It is black on all others.
Resizing windows is fast.
However scrolling emacs up and down redraws VERY slowly. which is very annoying.

glxinfo | grep render
direct rendering: Yes
OpenGL renderer string: Gallium 0.4 on AMD RV620
    GL_NV_conditional_render, GL_AMD_draw_buffers_blend, 

So If I disable Acceleration in Xorg.conf then:

Glxgears does not work. (Obviously)
Scrolling in windows like emacs is lighteningly fast.
Resizing windows IS VERY SLOW.

So Neither setup is perfect. I do not need 3d acceleration in the sence of running 3d applications but I want my desktop to move around smoothly.

Any help with this would be highly appreciated as I have been trying to get this working for a while now.

I think I have provided all the relevent information. Let me know if not!

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#2 2012-03-14 08:35:18

t1nk3r3r
Member
From: The Pacific Northwest
Registered: 2011-03-22
Posts: 79

Re: Slow 2D Acceleration with radeon and nouveau driver

Given the length of time since post, I thought it might be wise to search the web....

http://forums.nvidia.com/index.php?showtopic=184737
http://ubuntuforums.org/showthread.php?t=1724804

...for clues


--------------------------The only wasted day is one in which you learn nothing.--------------------------

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