Re: Radeon R200 DRI driver bug?

Jacobo Cabaleiro wrote:
> During the development of a small OpenGL app running under Radeon 9200 
> hardware (RV280) with DRI drivers, we found a little problem: usually 
> when the OpenGL program was loaded, X system hang completly (no 
> keyboard, no mouse) and system had to be restarted (SysRq SUB). Linux 
> kernel was still alive. This problem was also reproducible with Radeon 
> 9000 based hardware.
Those are usually symptoms of a gpu lockup.

> I say usually because running the program thru an Xnest make the issue 
> dissapear. Also old Xorg versions or different hardware (for example 
> Nvidia cards) didn't show the problem.
If you run it through Xnest, you don't get direct rendering, no?

> Running the same app under a xorg-server / Mesa / glib / gtk+ libs 
> compiled with debug info, shows this:
> ext_test: r200_vtxfmt.c:1045: r200VtxFmtFlushVertices: Assertion 
> `rmesa->dma.flush == 0 || rmesa->dma.flush == flush_prims' failed.
> with following backtrace:
> #0  0xffffe410 in __kernel_vsyscall ()
> #1  0xb758c241 in raise () from /lib/libc.so.6
> #2  0xb758dc9d in abort () from /lib/libc.so.6
> #3  0xb75859bb in __assert_fail () from /lib/libc.so.6
> #4  0xb6f74977 in r200_copy_to_current () from /usr/lib/dri/r200_dri.so
> #5  0xb6f9a4e6 in _mesa_EndList () from /usr/lib/dri/r200_dri.so
> #n and up, app calls
> 
> _mesa_EndList() gets called obviously when in my app a call to glEndList 
> is done. Is this a known problem? Could be a problem from my own app?
Possible it's triggered by doing something "illegal", but it shouldn't 
crash.
If you could isolate the problem with a small test app that would be 
most helpful. Possibly setting tcl_mode=1 (which will disable the r200 
vtxfmt code) might work around that issue.
You might want to try a newer Mesa version (6.5.1 rc or cvs).
This report though looks quite similar to something reported recently, 
http://marc.theaimsgroup.com/?l=dri-devel&m=115668401312399&w=2

> Please CC me as I'm not subscribed to the list.
If you are not subscribed, I think your messages will need manual review 
and maybe make it never to the list, not to mention suffer from delay 
(though maybe I'm confusing that with another list...).

Roland

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