Nouveau - Feb 2011 - [Bug 34179] New: Nouveau 3D driver: nv50_pc_emit.c:863 assertion error kills Compiz

https://bugs.freedesktop.org/show_bug.cgi?id=34179

           Summary: Nouveau 3D driver: nv50_pc_emit.c:863 assertion error
                    kills Compiz
           Product: Mesa
           Version: 7.10
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
        AssignedTo: nouveau at lists.freedesktop.org
        ReportedBy: sense at ubuntu.com


When you use the experimental Gallium3D driver of Nouveau to enable DRI, Compiz
will actually try to run, but it will be abort because of the following
assertion error:
"compiz: nv50_pc_emit.c:863: emit_flop: Assertion `STYPE(i, 0) == 0x09'
failed."

It seems that this only happens with PCI-E cards that have the NV50 chip.

There is an 'xorg.log' at
<http://launchpadlibrarian.net/63209980/XorgLog.txt>.
An unprocessed stacktrace can be found at
<http://launchpadlibrarian.net/63209976/Stacktrace.txt>, the stacktrace
processed by Apport at
<http://launchpadlibrarian.net/63321404/Stacktrace.txt>.
StacktraceTop:
 __kernel_vsyscall ()
 *__GI_raise (sig=6)
 *__GI_abort () at abort.c:59

This bug was originally reported by several people in Ubuntu on Launchpad, the
master bug report can be found at <https://launchpad.net/bugs/710588>. You
can
find many more log files at this bug report, and attached to its duplicates.
If you need something specifically, please ask!

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Sense Hofstede <sense at ubuntu.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://launchpad.net/bugs/
                   |                            |710588

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--- Comment #1 from Omer Akram <om26er at ubuntu.com> 2011-02-11 07:54:41
PST ---
Also to add this is used to work with mesa 7.9 the update to 7.10 broke things.

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--- Comment #2 from Christopher James Halse Rogers <chalserogers at
gmail.com> 2011-02-14 18:32:17 PST ---
This is fixed by the nv50 part of the commit:
commit 7401590dedf6f2abb1f0f0db988be90acb1fb84f
Author: Christoph Bumiller <e0425955 at student.tuwien.ac.at>
Date:   Mon Feb 7 14:54:17 2011 +0100

    nv50,nvc0: do not forget to apply sign mode to saved TGSI inputs

diff --git a/src/gallium/drivers/nv50/nv50_tgsi_to_nc.c
b/src/gallium/drivers/nv50/nv50_tgsi_to_nc.c
index d6b80c3..ce9300a 100644
--- a/src/gallium/drivers/nv50/nv50_tgsi_to_nc.c
+++ b/src/gallium/drivers/nv50/nv50_tgsi_to_nc.c
@@ -1130,7 +1130,7 @@ emit_fetch(struct bld_context *bld, const struct
tgsi_full_instruction *insn,
    case TGSI_FILE_INPUT:
       res = bld_saved_input(bld, idx, swz);
       if (res && (insn->Instruction.Opcode != TGSI_OPCODE_TXP))
-         return res;
+         break;

       res = new_value(bld->pc, bld->ti->input_file, type);
       res->reg.id = bld->ti->input_map[idx][swz];

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--- Comment #3 from Christopher James Halse Rogers <chalserogers at
gmail.com> 2011-02-14 18:39:20 PST ---
I've done a piglit run on my NV98 system against the 7.10 branch; this shows
no
difference with or without the cherry-pick.  So this doesn't regress
anything
obvious, but there's also clearly a piglit test to be written :).

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Marcin Slusarz <marcin.slusarz at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

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