I got this IBM Thinkpad T23 laptop, which is one of the most popular Linux-supported laptops ever. I have Ubuntu Hardy installed in there, latest version. I mostly use Blender for video editing on Linux, so I installed both the official Ubuntu Blender version 2.45 and later your 2.46 binary too.
But I experience the same problem with both versions: the interface is all garbled! It's impossible to click to anything, there are extreme visual artifacts on the blender window. There is no text on it at all, just moving artifacts when you move the mouse. You can barely make out that this is a Blender window!
No other app has this problem on my laptop. Please note that the 3D DRI driver is NOT installed, as Ubuntu does not provide it. I just use the normal xorg 2D driver, all default from Ubuntu's installer. The gfx card used is the "S3 SuperSavage IX dual-head" graphics card, at 1024x768 true color.
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Thanks for the report. It is very hard for us to debug this kind of thing since this is a pretty rare graphics card. Could you verify if other opengl applications work well (preferably something more advanced than glxgears), since Blender's interface is drawn completely using opengl.
I believe that some of Gnome's Cairo & vector apps like PyChess and Gnome Sodoku use (software-accelerated in my case) OpenGL, no? If yes, then these do work.
Sorry to say this, but the S3 company has no support for opengl at all (only direct3d). They produce extremely cheap low quality and windows-oriented hardware. It's a very bad choice for anyone who wants to make 3d graphics.
How (or if) the DRI team manages to make drivers for it I don't know... but be assured it's nothing we can do about.
This is a generic request to test your bug report and see if it is still an issue in 2.5alpha2 if so please let me know by making a comment in this report ie 'also in 2.5alpha2' and I will add it to the 2.5 bug list.