unity_support_test crashed with SIGSEGV

[WindTux]

i was searching updates when it gave the error

ProblemType: Crash
DistroRelease: Ubuntu 11.10
Package: nux-tools 1.0.4-0ubuntu1
ProcVersionSignature: Ubuntu 3.0.0-5.6-generic 3.0.0-rc7
Uname: Linux 3.0.0-5-generic x86_64
Architecture: amd64
CrashCounter: 1
Date: Wed Jul 13 17:21:06 2011
ExecutablePath: /usr/lib/nux/unity_support_test
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Alpha amd64 (20110620)
ProcCmdline: /usr/lib/nux/unity_support_test
ProcEnviron:
 LANGUAGE=es_VE:es
 LANG=es_VE.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x4012c2: movzbl (%rbx,%rax,1),%edx
 PC (0x004012c2) ok
 source "(%rbx,%rax,1)" (0x00000007) not located in a known VMA region (needed readable region)!
 destination "%edx" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nux
Stacktrace:
 #0 0x00000000004012c2 in ?? ()
 No symbol table info available.
 No se puede acceder a la memoria en la dirección 0x7fff876d66c8
StacktraceTop: ?? ()
ThreadStacktrace:
 .
 Hilo 1 (Thread 1370):
 #0 0x00000000004012c2 in ?? ()
 No symbol table info available.
 No se puede acceder a la memoria en la dirección 0x7fff876d66c8
Title: unity_support_test crashed with SIGSEGV
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:
 get_opengl_version (argc=<value optimized out>, argv=0x7fff876d67a8) at unity_support_test.c:122
 main (argc=<value optimized out>, argv=0x7fff876d67a8) at unity_support_test.c:545

[Dan Wood (dan-wood)]

I got this bug just after logging in to a fresh install of 11.10 beta, after had I rebooted to enable the proprietary NVIDIA drivers.

Apport collected a lot of info, but it seems to have eaten it?! Sorry!

[Mikkel Kamstrup Erlandsen (kamstrup)]

When using my laptop's discrete nvidia card Unity works fine, but when enabling the embedded intel card it fails as reported (Intel HD Graphics 3000 (SandyBridge)).

Interestingly when running glxinfo I just get:

  Error: couldn't find RGB GLX visual or fbconfig
  Xlib: extension "GLX" missing on display ":0".

A month back in the Oneiric cycle or so this intel card worked very well. So looks like a regression in the X stack or intel driver somewhere?

[Keith Kessler (keithkessler)]

This crash occurred shortly after I accidentally touched the touchscreen on my ASUS T101MT.

Please support this hardware better. There is no reason my session should crash (i.e., screen flashes and then I am brought back to a login screen) when I touch my touchscreen. You need a better default driver to handle unsupported hardware.

[Eugene San (eugenesan)]

Confirming #6 assumption.
GLX is broken on xserver-xorg-video-intel=2:2.15.901-1ubuntu2, while was functional in Beta2.

Prevents from running Unity-3D as well as Gnome-Shell.

[Eugene San (eugenesan)]

Just found the reason for GLX and unity_support_test failures, at least in my case.

nvidia-current driver replaces system GL libraries with it's own, breaking GLX.

With removal of nvidia-current, problem solved.

To #6, I am afraid concurrent Nvidia and Intel cards in 3D mode is currently impossible.

[Id2ndR (id2ndr)]

In my case, this bug appears because I restarted the computer on an old Linux version where nvidia driver is not fonctional.

[marcobra (Marco Braida) (marcobra)]

I get this crash report on just upgraded natty to Oneiric on a Ibm Thinkpad

[Jay Taoko (jaytaoko)]

Try "glxinfo" on the system and report what you get. If glxinfo fails, then there is a problem with the driver installation. You may also run "/usr/lib/nux/unity_support_test -p" and report what you get.

[sseitz (s-seitz)]

On latest oneiric I've got following result:

/usr/lib/nux/unity_support_test -p
Segmentation fault (core dumped)

NVidia driver is 280.13, glxinfo is attached as file.

[Jay Taoko (jaytaoko)]

@sseitz
Thanks for the report. Do you think you can provide a stack trace of the crash in unity_support_test.
Also, when did the problem started to appear on your system? Did it started after an upgrade from Natty to Oneiric or following a recent but progressive upgrade of your system?

[Thomas Schwiertz (thomas-schwiertz)]

Also getting this error every time try to run a system update.

Runing glxinfo I get the following:

name of display: :0
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Error: couldn't find RGB GLX visual or fbconfig

Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".
Xlib: extension "GLX" missing on display ":0".

[Kevin Daly (kedaly-yahoo)]

I'm having the same problem as well.. Dual Intel & NVIDIA Vostro 3750

[sseitz (s-seitz)]

@Jay Taoko

Sorry for the late response, I don't know how to do a stack trace w/ symbols.

gdb --args /usr/lib/nux/unity_support_test -p

shows

Starting program: /usr/lib/nux/unity_support_test -p
[Thread debugging using libthread_db enabled]

Program received signal SIGSEGV, Segmentation fault.
0x08048ed2 in ?? ()

I assume this is doesn't help very much.

[Thomas (t.c)]

For backtrace look there:

https://wiki.ubuntu.com/Backtrace
https://wiki.ubuntu.com/DebuggingProgramCrash

[sseitz (s-seitz)]

Thank's thomas,

i've done the backtraces with the original nux-tools and additionally with the nux-tools-dbgsym.
gdb output is attached.

[sseitz (s-seitz)]

regarding #19, see attachment.

[Jay Taoko (jaytaoko)]

This bug is related to the graphics stack. Having 2 gpus on the system, the graphics stack and all the tools involved have to make sure that the right opengl drivers are install. Until a fix is done on the graphics stack side, see if you can make sure that you only have either the Intel opengl libraries on your system or the other gpu's libraries.

[sseitz (s-seitz)]

Regarding #21.
Thank You guys for trying to solve this issue, but I'm afraid I do not have to different kinds of GPU at that machine.
Indeed, it's a quad monitor setup on two identical GeForce 7300 LE using Oneiric's propriatery nvidia 280.13.
Just ask, if you need more logfiles, gdb outputs, etc... I'll post anything which could be helpful, cause it's a bad fact that (at least my own) multi monitor setups are getting worse by each release :(

[Cory Maccarrone (darkstar6262)]

Yeah, I have to agree with #22 - my system isn't even dual-monitor, it's a laptop with no other monitors attached. The NVIDIA gpu is the only one in the system.

[Tim Penhey (thumper)]

@Cory, can you give more details on your graphics card and gpu?

There seem to be lots of duplicates of this bug. If you are having this issue, and you don't see your graphics card mentioned, please can you add the info to this bug?

Please also mention if you tend to have external monitors plugged in to laptops, or desktops with multiple monitors, systems with multiple GPUs, or anything you can think of that might be relevant.

Thanks.

[Cory Maccarrone (darkstar6262)]

My GPU is a Nvidia GeForceGT 130M (G96) discrete graphics card in a Lenovo Y550 laptop. I almost never have other monitors attached.

In all honesty I haven't seen this issue for a long time now, so I'd say it doesn't affect me anymore.

[Jay Taoko (jaytaoko)]

Many of the duplicate bugs report errors with loading of GLX.
         extension "GLX" missing on display ":0".
         Xlib: extension "GLX" missing on display ":0".
         Xlib: extension "GLX" missing on display ":0".

Many of the Xorg logs also report error in loading of the Nvidia or Nouveau driver. I will add a test to detect the presence of GLX on the system. If the system does not have GLX support, then unity_support_test will not continue further and the test will fail (but not crash).

[Arnau (arnaugm)]

In my case unity_support_test continues crashing with a segmentation fault.
I attach the glxinfo output.

[Arnau (arnaugm)]

I noticed that my crash is related with Separate X Screen + Xinerama configuration in two screens.
I'm using the last official Nvidia driver from their website, and I also tried with the versions available in "Addition drivers".

Using Twinview I don't have a crash.
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: Quadro 1000M/PCI/SSE2
OpenGL version string: 4.2.0 NVIDIA 290.10

[Alberto Salvia Novella (es20490446e)]

Since this bug:

- Is valid.
- Is well described.
- Is reported in the upstream project.
- Is ready to be worked on by a developer.

It's already triaged.

[Christopher Forster (christopherforster)]

Is bug #1190333 really a duplicate of this bug?

[Colin Law (colin-law)]

Bug #1213319 has just been marked as a dup of this, but since it has only just started happening following an update to nux-tools to 4.0.2+13.10.20130816.2-0ubuntu1 on Saucy it is difficult to see how it can be the same bug that is marked with Oneiric as a milestone on nux and is marked fix released on Precise. Could it be a new bug?
Strangely Bug #1213319 seems to be inaccessible at the moment, hopefully just a temporary problem.

[Elliott Balsley (elliottbalsley)]

I'm running Precise on an Nvidia ION system (single GPU).
/usr/lib/nux/unity_support_test
shows
Segmentation fault (core dumped)

[jsass (sass-joel)]

I am having the same issue as reported above. Nux is causing the problems, and I am running 2 nvidia 120GT video cards w/two monitors.