ATI Graphics Problems

[mongomunken]

I'm using the open source ATI driver, mesa 7.7, and installed libtxc.
Attached a screenshot.

[Arafails]

Yep, that's about what you get. 'Fraid there's no pointing telling NGD about it.

This is because the opensource radeon stack does not at this time upload S3TC compressed textures. (Radeon 9500 - HD1xxx series part of the driver used to but seems not to anymore?)

In fact up until recently they would upload to the space allocated for a compressed texture the uncompressed equivalent texture's worth of garbage, causing the effect you see here – the renderer rejects the texture upload, but uses its allocated space anyway.

In the more recent versions of mesa (I'm using the 7.9 development branch with an HD2600), the radeon driver actually handles failed texture uploads better by not applying the texture during rendering, but as RO has no fallback lowres textures the results are more or less uniformly shaded objects. The ground is a different colour, though.

[Znurre]

I helped my friend (mongomunken) install latest git snapshots of mesa, dri2proto, libgl etc. and the textures actually works now.
However, performance is really poor.

The FPS dropped from ~1700 to ~400 in glxgears and Regnum is below 1 fps.
Have you got any idea what might be causing this bad performance?

EDIT: And compositing + desktop effects stopped working too, if that gives any clue.

[Arafails]

That actually sounds like you've lost direct rendering entirely....

[Znurre]

That's what I checked first of all.

glxinfo | grep Direct

returns "Yes".

[Arafails]

but what does

glxinfo | grep renderer

show? There is a software "DRI" driver that tends to be built with other DRI drivers these days, and it will give "Yes" on the direct rendering line also.

[Anpu]

I have different ATI problem, for example.
When I start Regnum and resources start loading, at one point game freezes, and in console I m getting following message on every mm of mouse move:

Failed to allocate :
   size      : -27392 bytes
   alignment : 4 bytes
   domains   : 2

After 9.04->9.10 update game stopped working. On 9.04 it worked (with not much fps but at least worked).

Spec:
AMD Sempron 64 2600+
2GB RAM
ATI Radeon 9250
Kubuntu Lucid (10.04)
Xorg: http://www.pastie.org/878935
Mesa 7.9-devel
glxinfo: http://www.pastie.org/878943

[Anpu]

After very very long time, i finally managed today to log in game.
Game is not playable but at least I can log in.
FPS in char selection screen is 17-20, while standing at CS is 7-9.
I was regularly updating stuf in 10.04 beta, with added repo:
http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu

Basically, that repo is last hope for ATI, Intel etc.
For Radeon, you can also try find help at freenode IRC, channel #radeon.
There are few more driver and card related channels created for support..

[Znurre]

I have yet to be able to test anything on my friends computer, maybe this weekend.

[Cuchulainn]

The graphic with the Radeon and mesa driver changed a bit in the last few months, thats how it looks now (mesa 7.8.1, radeon 6.13):
http://img695.imageshack.us/img695/6...0041500113.jpg

I'm using a Radeon HD 4650 card, with catalyst driver and everything maxed I have usually 25+ fps. As soon as catalyst is compatible with Fedora 13 (beta) and xorg-server 1.8.0 I'll switch the drivers.