Comment 0 for bug 827611

After upgrading the memory from 8GB to 16GB I get randomly segmentation faults of the X server. Tests with either set of 8GB works fine and a memory test (memtest86+) ran for a week without any complaints. The machine is a Lenovo Thinkpad W510 with an nVidia Quadro FX880M running Maverick (10.10). I utilize the nVidia drivers that came with Ubuntu although they are marked as Beta?! Basically the same problem exists on my workstation that had from the go get 16GB but it runs Natty (11.04).

Xorg.log:
Backtrace:
[ 64497.326] 0: /usr/bin/X (xorg_backtrace+0x28) [0x45c5a8]
[ 64497.326] 1: /usr/bin/X (0x400000+0x5a87d) [0x45a87d]
[ 64497.326] 2: /lib/libpthread.so.0 (0x7faadb0c7000+0xfb40) [0x7faadb0d6b40]
[ 64497.326] 3: /usr/lib/xorg/extra-modules/nvidia_drv.so (0x7faad5a3f000+0x3a3a7c) [0x7faad5de2a7c]
[ 64497.326] 4: /usr/bin/X (FreeClientResources+0xef) [0x44adef]
[ 64497.326] 5: /usr/bin/X (CloseDownClient+0x5c) [0x43b2ac]
[ 64497.326] 6: /usr/bin/X (0x400000+0x3fa46) [0x43fa46]
[ 64497.326] 7: /usr/bin/X (0x400000+0x2187b) [0x42187b]
[ 64497.326] 8: /lib/libc.so.6 (__libc_start_main+0xfe) [0x7faada032d8e]
[ 64497.326] 9: /usr/bin/X (0x400000+0x21409) [0x421409]
[ 64497.326] Segmentation fault at address (nil)
[ 64497.326]
Caught signal 11 (Segmentation fault). Server aborting

From lspci:
01:00.0 VGA compatible controller: nVidia Corporation GT216 [Quadro FX 880M] (rev a2)

From dpkg (nvidia)
ii nvidia-173-modaliases 173.14.28-0ubuntu1 Modaliases for the NVIDIA binary X.Org driver
ii nvidia-96-modaliases 96.43.19-0ubuntu1 Modaliases for the NVIDIA binary X.Org driver
ii nvidia-common 0.2.24 Find obsolete NVIDIA drivers
ii nvidia-current 260.19.06-0ubuntu1 NVIDIA binary Xorg driver, kernel module and VDPAU library
ii nvidia-current-modaliases 260.19.06-0ubuntu1 Modaliases for the NVIDIA binary X.Org driver
ii nvidia-settings 260.19.06-0ubuntu1 Tool of configuring the NVIDIA graphics driver

From dpkg (xorg):
ii xorg 1:7.5+6ubuntu3 X.Org X Window System
ii xorg-docs-core 1:1.5-1 Core documentation for the X.org X Window System
ii xserver-xorg 1:7.5+6ubuntu3 the X.Org X server
ii xserver-xorg-core 2:1.9.0-0ubuntu7.3 Xorg X server - core server
ii xserver-xorg-input-all 1:7.5+6ubuntu3 the X.Org X server -- input driver metapackage
ii xserver-xorg-input-evdev 1:2.3.2-6ubuntu3.1 X.Org X server -- evdev input driver
ii xserver-xorg-input-mouse 1:1.5.0-2build1 X.Org X server -- mouse input driver
ii xserver-xorg-input-synaptics 1.2.2-2ubuntu5 Synaptics TouchPad driver for X.Org server
ii xserver-xorg-input-vmmouse 1:12.6.9-2build1 X.Org X server -- VMMouse input driver to use with VMWare
ii xserver-xorg-input-wacom 1:0.10.8-0ubuntu1 X.Org X server -- Wacom input driver
ii xserver-xorg-video-all 1:7.5+6ubuntu3 the X.Org X server -- output driver metapackage
ii xserver-xorg-video-apm 1:1.2.3-0ubuntu1 X.Org X server -- APM display driver
ii xserver-xorg-video-ark 1:0.7.2-2build2 X.Org X server -- ark display driver
ii xserver-xorg-video-ati 1:6.13.1-1ubuntu5 X.Org X server -- AMD/ATI display driver wrapper
ii xserver-xorg-video-chips 1:1.2.3-1 X.Org X server -- Chips display driver
ii xserver-xorg-video-cirrus 1:1.3.2-2ubuntu3 X.Org X server -- Cirrus display driver
ii xserver-xorg-video-fbdev 1:0.4.2-2ubuntu2 X.Org X server -- fbdev display driver
ii xserver-xorg-video-i128 1:1.3.3-2build2 X.Org X server -- i128 display driver
ii xserver-xorg-video-intel 2:2.12.0-1ubuntu5.2 X.Org X server -- Intel i8xx, i9xx display driver
ii xserver-xorg-video-mach64 6.8.2-3build2 X.Org X server -- ATI Mach64 display driver
ii xserver-xorg-video-mga 1:1.4.11.dfsg-4build1 X.Org X server -- MGA display driver
ii xserver-xorg-video-neomagic 1:1.2.4-3build2 X.Org X server -- Neomagic display driver
ii xserver-xorg-video-nouveau 1:0.0.16+git20100805+b96170a-0ubuntu1 X.Org X server -- Nouveau display driver (experimental)
ii xserver-xorg-video-nv 1:2.1.17-3ubuntu3 X.Org X server -- NV display driver
ii xserver-xorg-video-openchrome 1:0.2.904+svn842-0ubuntu1 X.Org X server -- VIA display driver
ii xserver-xorg-video-r128 6.8.1-3build1 X.Org X server -- ATI r128 display driver
ii xserver-xorg-video-radeon 1:6.13.1-1ubuntu5 X.Org X server -- AMD/ATI Radeon display driver
ii xserver-xorg-video-rendition 1:4.2.4-0ubuntu1 X.Org X server -- Rendition display driver
ii xserver-xorg-video-s3 1:0.6.3-2build2 X.Org X server -- legacy S3 display driver
ii xserver-xorg-video-s3virge 1:1.10.4-2build2 X.Org X server -- S3 ViRGE display driver
ii xserver-xorg-video-savage 1:2.3.1-2ubuntu2.1 X.Org X server -- Savage display driver
ii xserver-xorg-video-siliconmotion 1:1.7.4-0ubuntu2 X.Org X server -- SiliconMotion display driver
ii xserver-xorg-video-sis 1:0.10.3-1build1 X.Org X server -- SiS display driver
ii xserver-xorg-video-sisusb 1:0.9.4-0ubuntu1 X.Org X server -- SiS USB display driver
ii xserver-xorg-video-tdfx 1:1.4.3-2build2 X.Org X server -- tdfx display driver
ii xserver-xorg-video-trident 1:1.3.4-0ubuntu1 X.Org X server -- Trident display driver
ii xserver-xorg-video-tseng 1:1.2.4-0ubuntu1 X.Org X server -- Tseng display driver
ii xserver-xorg-video-vesa 1:2.3.0-3build1 X.Org X server -- VESA display driver
ii xserver-xorg-video-vmware 1:11.0.1-2build1 X.Org X server -- VMware display driver
ii xserver-xorg-video-voodoo 1:1.2.4-0ubuntu1 X.Org X server -- Voodoo display driver