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Old 03-14-2011, 11:59 AM   #1
Arafails
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Default State of regnum on open source radeon drivers - Gallium3D/R600

For the first time, with a patch not yet in the kernel trunk but which should make it into 2.6.39 (fingers crossed), I can load up RO without rebooting to binary failgraphix driver (yes I'm aware the l and g are the wrong way around). This is with r600g from latest Mesa git and linux 2.6.38-rc7 with r600 texture checker overhaul (ie. the latest stuff for Radeon HD 3xxx, 4xxx, 5xxx, and some 6xxx cards).



As you can see, there are still a few issues. This is on fixed pipeline because SM 2.0 support results in a black screen (textures working now so it doesn't hang the driver any more, I believe these are mostly due to errors in the driver. Hopefully soon I will be able to play on the opensource drivers with a groin, not having to look and dodgy underwear, and trees with leaves.
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Old 03-14-2011, 03:28 PM   #2
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Quote:
Originally Posted by Arafails View Post
...
Awesome news ! I have read lot of news about R600g lately on Phoronix but I didn't expect it to be so advanced now.
The last time I tested R600g on my HD4670 I had fixed pipeline working but textures weren't working at all, even by installing the lib s3tc, then I read that s3tc was unsupported on the R600g, but it seems working now as far as I can see here.

That's how it was looking some months ago when I tried R600g :





Anyways, on what GPU did you test it ?

I really hope someday I could get rid of fglrx....
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Old 03-14-2011, 10:39 PM   #3
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GPU I tested on was a Radeon 4200 IGP from the 785G southbridge. This is roughly equivalent to a 3850 discrete GPU but slower. I'd be interested to know if a better chip can run with playable FPS or shaders enabled (my black screen may be a gpu-specific bug).

The relevant kernel patch you need to get the texture checker to support S3TC is in Dave Airlie's drm-radeon-testing branch: http://git.kernel.org/?p=linux/kerne...756b9ea8dd387e. It applies cleanly cherry-pick'd to the main kernel tree and builds without anything else (at least on the v2.6.38-rc7 tag).

To enable GL_EXT_texture_compression_s3tc and GL_S3_s3tc, and thus get rid of the "video card is too old" message, you need libtxc-dxtn installed and to set an R600_ENABLE_S3TC environment variable before running RO.

For most things it works just fine, but in RO a lot is broken. Most of the bridge are invisible for one thing, and forts seem to be largely made out of scaffolding. Although, again, this could be gpu-specific bugs. Please post your results if you get around to trying it out.
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Old 03-30-2011, 06:46 PM   #4
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Quote:
Originally Posted by Arafails View Post
GPU I tested on was a Radeon 4200 IGP from the 785G southbridge. This is roughly equivalent to a 3850 discrete GPU but slower. I'd be interested to know if a better chip can run with playable FPS or shaders enabled (my black screen may be a gpu-specific bug).
[...]
I tested it under Fedora 15 testing and got the same result. Shader 2 is black too.
result with Radeon 3200 IGP: http://img228.imageshack.us/i/screen...033016415.jpg/
result with Radeon 4650: http://img5.imageshack.us/i/screensh...033017174.jpg/

I get only 19 frames per second with fixed shader mode. As comparison with proprietary drivers I could get about 40 fps with shader 4.

Quote:
To enable GL_EXT_texture_compression_s3tc and GL_S3_s3tc, and thus get rid of the "video card is too old" message, you need libtxc-dxtn installed and to set an R600_ENABLE_S3TC environment variable before running RO.
[...]
command to to set an R600_ENABLE_S3TC environment variable is "export R600_ENABLE_S3TC=1"
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Old 04-10-2011, 11:10 AM   #5
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Something I hadn't thought of trying before, but if you force safe mode stuff shows properly. On my machine it's about 25% slower than with fglrx on shader model 2.0

Also if I understand correctly (I'm sticking with the 2.6.38 release until later in .39's release cycle) the relevant patch has actually landed in the kernel mainline.
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Old 09-22-2011, 12:23 PM   #6
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Hi all,

I have made some test in ubuntu 11.04 (2.6.38-11) with the opensource driver (because propietary drivers is not supported anymore)

I could play regnum online without fails (by using "safe mode")

the problem was FPS. between 14 - 20.

my specs:

athlon xp 2100+ @1.73MHZ
Ati X1650 pro 512MB AGP
1GB ddr @333mhz

is there a way to improve the performance?
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