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On 2011-04-11T20:20:08+00:00 Andrea-turrini wrote:

User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:2.0.0)
Gecko/20100101 Firefox/4.0

I am using openSUSE 11.4 completely updated, KDE 4.6.2 from repo K:R:46
and LibreOffice from repo LibreOffice:/Stable.

My video card is identified by lspci as:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset 
Integrated Graphics Controller (rev 07)
and by X as: Intel(R) GM45.
In ~/.xsession-error sometimes I find:
OpenGL vendor string:                   Tungsten Graphics, Inc
OpenGL renderer string:                 Mesa DRI Mobile Intel® GM45 Express 
Chipset GEM 20100330 DEVELOPMENT 
OpenGL version string:                  2.1 Mesa 7.10
OpenGL shading language version string: 1.20
Driver:                                 Intel
GPU class:                              i965
OpenGL version:                         2.1
GLSL version:                           1.20
Mesa version:                           7.10
X server version:                       1.9.3
Linux kernel version:                   2.6.37
Direct rendering:                       yes
Requires strict binding:                yes
GLSL shaders:                           yes
Texture NPOT support:                   yes

If I use the intel driver (from package xorg-x11-driver-video-7.6-52.4)
sometimes the cpu goes to 100% and then X crashes. This event is quite
rare and it is very difficult to reproduce and even to understand what
induces it.

However using libreoffice I am able to induce probably the same crash, creating 
an empty presentation and then changing the zoom to at least 1200% using the 
slider or typing it after a double click on the zoom factor. The same happens 
using libreoffice draw (with the same zoom factor).
If I change the Xorg driver from intel to intellegacy (from package 
xorg-x11-driver-video-intel-legacy-2.9.1-8.1) the above procedure does not 
induce a crash of X.

The crash occurs also with a fresh user with all desktop effects
disabled.

Before submitting this report, I asked in a forum to reproduce the bug

Reproducible: Always

Steps to Reproduce:
1. Start X using the intel driver on a GM45 video card
2. Launch libreoffice impress and create an empty presentation
3. Change zoom to at least 1200%
Actual Results:  
X crashes and the login screen comes up

Expected Results:  
X does not crash, as happens using intellegacy driver

In the Xorg.0.log file there is the following backtrace of the crash:

Backtrace:
[ 23062.651] 0: /usr/bin/Xorg (xorg_backtrace+0x28) [0x463678]
[ 23062.651] 1: /usr/bin/Xorg (0x400000+0x6ae89) [0x46ae89]
[ 23062.651] 2: /lib64/libc.so.6 (0x7f157045c000+0x32b30) [0x7f157048eb30]
[ 23062.652] 3: /usr/lib64/xorg/modules/drivers/intel_drv.so 
(0x7f156e87d000+0x12696) [0x7f156e88f696]
[ 23062.652] 4: /usr/lib64/xorg/modules/drivers/intel_drv.so 
(0x7f156e87d000+0x30614) [0x7f156e8ad614]
[ 23062.652] 5: /usr/bin/Xorg (0x400000+0xd8861) [0x4d8861]
[ 23062.652] 6: /usr/bin/Xorg (0x400000+0x2f6b1) [0x42f6b1]
[ 23062.652] 7: /usr/bin/Xorg (0x400000+0x25ace) [0x425ace]
[ 23062.652] 8: /lib64/libc.so.6 (__libc_start_main+0xfd) [0x7f157047abfd]
[ 23062.652] 9: /usr/bin/Xorg (0x400000+0x25679) [0x425679]
[ 23062.652] Segmentation fault at address 0x3f
[ 23062.652] 
Fatal server error:
[ 23062.652] Caught signal 11 (Segmentation fault). Server aborting
[ 23062.652] 
[ 23062.652] 
Please consult the The X.Org Foundation support 
         at http://wiki.x.org
 for help. 
[ 23062.652] Please also check the log file at "/var/log/Xorg.0.log" for 
additional information.
[ 23062.652]

Reply at: https://bugs.launchpad.net/df-
libreoffice/+bug/481030/comments/10

------------------------------------------------------------------------
On 2011-04-11T20:23:55+00:00 Andrea-turrini wrote:

I forgot to say that I asked in a forum to try to reproduce the crash, but 
noone using an ATI or a NVidia card is able to induce the crash following the 
above steps.
If I try in VirtualBox with the same configuration of KDE e libreoffice, no 
crash occurs.

Reply at: https://bugs.launchpad.net/df-
libreoffice/+bug/481030/comments/11


** Changed in: df-libreoffice
       Status: Unknown => Confirmed

** Changed in: df-libreoffice
   Importance: Unknown => Critical

** Changed in: libreoffice (openSUSE)
       Status: Unknown => In Progress

** Changed in: libreoffice (openSUSE)
   Importance: Unknown => Critical

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https://bugs.launchpad.net/bugs/481030

Title:
  Huge memory allocation on zoom in Impress

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