Nouveau - Jan 2019 - [Bug 109230] New: [crash] Xorg is crashing on startup with enabled xinerama

https://bugs.freedesktop.org/show_bug.cgi?id=109230

            Bug ID: 109230
           Summary: [crash] Xorg is crashing on startup with enabled
                    xinerama
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: manio at skyboo.net
        QA Contact: xorg-team at lists.x.org

Dual gpu configuration: radeon + nouveau.
When xinerama is enabled xorg is crashing with the following backtrace:

[1208755.149] (EE) Backtrace:
[1208755.159] (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x139) [0x55b646b6afc9]
[1208755.160] (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x50)
[0x7f7d21b486ff]
[1208755.162] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0x10b)
[0x7f7d219aa85b]
[1208755.163] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (abort+0x121)
[0x7f7d21995535]
[1208755.164] (EE) unw_get_proc_name failed: no unwind info found [-10]
[1208755.164] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (?+0x0) [0x7f7d21995400]
[1208755.165] (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (__assert_fail+0x42)
[0x7f7d219a30a2]
[1208755.166] (EE) 6: /usr/lib/xorg/modules/drivers/nouveau_drv.so
(_init+0x433b3) [0x7f7d1ff2e743]
[1208755.167] (EE) 7: /usr/lib/xorg/modules/drivers/nouveau_drv.so
(_init+0x4430a) [0x7f7d1ff304ea]
[1208755.168] (EE) 8: /usr/lib/xorg/modules/drivers/nouveau_drv.so
(_init+0x48b20) [0x7f7d1ff39480]
[1208755.169] (EE) 9: /usr/lib/xorg/modules/drivers/nouveau_drv.so
(_init+0x3b581) [0x7f7d1ff1ea81]
[1208755.175] (EE) 10: /usr/lib/xorg/Xorg (InitExtensions+0x63e)
[0x55b646a7affe]
[1208755.176] (EE) 11: /usr/lib/xorg/Xorg (InitFonts+0x279) [0x55b646a10839]
[1208755.178] (EE) 12: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xeb)
[0x7f7d2199709b]
[1208755.178] (EE) 13: /usr/lib/xorg/Xorg (_start+0x2a) [0x55b6469fa68a]

Related with?
https://bugs.freedesktop.org/show_bug.cgi?id=108495

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190106/79e4bca4/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

--- Comment #1 from Mariusz Białończyk <manio at skyboo.net> ---
Created attachment 142983
  --> https://bugs.freedesktop.org/attachment.cgi?id=142983&action=edit
full Xorg.log

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190106/df80a092/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

--- Comment #2 from Mariusz Białończyk <manio at skyboo.net> ---
Created attachment 142984
  --> https://bugs.freedesktop.org/attachment.cgi?id=142984&action=edit
xorg.conf

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190106/e44a0cea/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Looks like an assertion is failing in nouveau somewhere. I doubt it's
related
to the intel SNA bug.

Do you have a debug symbols package you could install? Or perhaps build
xf86-video-nouveau yourself?

Also, to eliminate some potential complications -- try commenting out the
RADEON bit and ensure that it keeps failing. (Not that that shouldn't work,
but
good to know for debugging purposes.)

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190106/8803d340/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

--- Comment #4 from Mariusz Białończyk <manio at skyboo.net> ---
Hi Ilia,
> Do you have a debug symbols package you could install? Or perhaps build
> xf86-video-nouveau yourself?
yes - I installed it, but the line:
"unw_get_proc_name failed: no unwind info found"
was still there, so I compiled nouveau myself and installed with debug symbols
but it doesn't help to full unwind, so finally I compiled whole xorg+debug
symbols and complete unwind still doesn't happen.
Isn't it that this unwind is for some libc calls which is irrelevant?
I am attaching new backtrace from console output.
> Also, to eliminate some potential complications -- try commenting out the
> RADEON bit and ensure that it keeps failing. (Not that that shouldn't
work,
> but good to know for debugging purposes.)
No, it is not failing with nouveau alone (and commented radeon driver).

I was also trying to disable xinerama (with radeon+nouveau) - then it is also
not failing. It seems this is triggering only with enabled xinerama and both
radeon and nouveau drivers loaded.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190107/17619673/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

--- Comment #5 from Mariusz Białończyk <manio at skyboo.net> ---
Created attachment 142995
  --> https://bugs.freedesktop.org/attachment.cgi?id=142995&action=edit
startx - backtrace on console output

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190107/2d528890/attachment-0001.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

--- Comment #6 from Ilia Mirkin <imirkin at alum.mit.edu> ---
OK, that's helpful:

Xorg: /usr/include/xorg/privates.h:121: dixGetPrivateAddr: Assertion
`key->initialized' failed.

Can you stick a "return false" at the top of nouveau_sync_init and see
if that
helps?

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190107/9ae55d87/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

--- Comment #7 from Mariusz Białończyk <manio at skyboo.net> ---
Added this and it doesn't help. Can I somehow disable all RandR calls?

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190107/acea0363/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

--- Comment #8 from Ilia Mirkin <imirkin at alum.mit.edu> ---
You could make drmmode_display.c:has_randr unconditionally return
"false".

Getting a proper backtrace would be really nice though. Perhaps you can get it
in gdb? (Although it would be easiest to do that from a different machine over
ssh.)

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190107/59871b9a/attachment.html>

https://bugs.freedesktop.org/show_bug.cgi?id=109230

Mariusz Białończyk <manio at skyboo.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|Driver/nouveau              |Driver/Radeon
           Assignee|nouveau at lists.freedesktop.o |xorg-driver-ati at
lists.x.org
                   |rg                          |

--- Comment #9 from Mariusz Białończyk <manio at skyboo.net> ---
I was able to collect proper backtrace with symbols. And it seems the problem
is the radeon.
I am attaching full backtrace.

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<https://lists.freedesktop.org/archives/nouveau/attachments/20190107/aada11c1/attachment.html>