<div class="gmail_quote">Hi, Problem description: Oops occurs randomly. It is pretty much reproducible when gnome-shell is used. It occurs as soon as any applications in gnome-shell is started. It does not occur with xfce without compiz. It occurs if xfce is used with compiz and few effects are enabled. Please see attached photo. I have also attached output of lspci -vvv as root. $ sh scripts/ver_linux Linux milindm-desktop 2.6.39-ARCH #1 SMP PREEMPT Fri May 20 09:09:27 UTC 2011 i686 Intel(R) Pentium(R) 4 CPU 3.00GHz GenuineIntel GNU/Linux Gnu C 4.6.0 Gnu make 3.82 binutils 2.21.0.20110430 util-linux 2.19.1 mount support module-init-tools 3.12 e2fsprogs 1.41.14 jfsutils 1.1.14 reiserfsprogs 3.6.21 xfsprogs 3.1.5 pcmciautils 017 PPP 2.4.5 Linux C Library 2.13 Dynamic linker (ldd) 2.13 Linux C++ Library 6.0.16 Procps 3.2.8 Net-tools 1.60 Kbd 1.15.3 Sh-utils 8.12 wireless-tools 29 Modules Loaded ipv6 fuse usbhid hid snd_intel8x0 snd_ac97_codec ac97_bus snd_pcm snd_timer snd uhci_hcd psmouse soundcore ppdev ehci_hcd processor sg 8139too iTCO_wdt mii snd_page_alloc i2c_i801 parport_pc lp evdev usbcore iTCO_vendor_support parport tg3 dcdbas serio_raw libphy pcspkr ext4 mbcache jbd2 crc16 sr_mod cdrom sd_mod ata_piix pata_acpi libata scsi_mod i915 drm_kms_helper drm intel_agp i2c_algo_bit button intel_gtt agpgart i2c_core video [milindm@milindm-desktop linux-2.6.39]$ cat /proc/version Linux version 2.6.39-ARCH (tobias@T-POWA-LX) (gcc version 4.6.0 20110513 (prerelease) (GCC) ) #1 SMP PREEMPT Fri May 20 09:09:27 UTC 2011 [milindm@milindm-desktop linux-2.6.39]$ pacman -Q kernel26 kernel26 2.6.39-1 [milindm@milindm-desktop linux-2.6.39]$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 15 model : 3 model name : Intel(R) Pentium(R) 4 CPU 3.00GHz stepping : 4 cpu MHz : 2992.613 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pebs bts pni dtes64 monitor ds_cpl cid xtpr bogomips : 5987.61 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 32 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 15 model : 3 model name : Intel(R) Pentium(R) 4 CPU 3.00GHz stepping : 4 cpu MHz : 2992.613 cache size : 1024 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe constant_tsc pebs bts pni dtes64 monitor ds_cpl cid xtpr bogomips : 5987.37 clflush size : 64 cache_alignment : 128 address sizes : 36 bits physical, 32 bits virtual power management: [milindm@milindm-desktop linux-2.6.39]$ cat /proc/modules ipv6 243084 14 - Live 0xf87aa000 fuse 56837 3 - Live 0xf809b000 usbhid 30499 0 - Live 0xf8eb7000 hid 62335 1 usbhid, Live 0xf8e6f000 snd_intel8x0 22012 2 - Live 0xf8e28000 snd_ac97_codec 87717 1 snd_intel8x0, Live 0xf8dfc000 ac97_bus 778 1 snd_ac97_codec, Live 0xf8dd5000 snd_pcm 58607 2 snd_intel8x0,snd_ac97_codec, Live 0xf8dba000 snd_timer 15150 1 snd_pcm, Live 0xf8d99000 snd 42183 8 snd_intel8x0,snd_ac97_codec,snd_pcm,snd_timer, Live 0xf8d7c000 uhci_hcd 18952 0 - Live 0xf8d4b000 psmouse 54703 0 - Live 0xf8cb6000 soundcore 4858 1 snd, Live 0xf8d13000 ppdev 4686 0 - Live 0xf8c31000 ehci_hcd 34135 0 - Live 0xf8c4b000 processor 21396 0 - Live 0xf8bfe000 sg 20662 0 - Live 0xf8bcb000 8139too 17088 0 - Live 0xf8ba7000 iTCO_wdt 10165 0 - Live 0xf8b90000 mii 3279 1 8139too, Live 0xf8b81000 snd_page_alloc 5837 2 snd_intel8x0,snd_pcm, Live 0xf8b76000 i2c_i801 6903 0 - Live 0xf8b6a000 parport_pc 27518 1 - Live 0xf8b2c000 lp 6634 0 - Live 0xf8b1a000 evdev 7118 4 - Live 0xf8b45000 usbcore 115644 4 usbhid,uhci_hcd,ehci_hcd, Live 0xf898d000 iTCO_vendor_support 1481 1 iTCO_wdt, Live 0xf891d000 parport 25531 3 ppdev,parport_pc,lp, Live 0xf893e000 tg3 112584 0 - Live 0xf88ed000 dcdbas 4148 0 - Live 0xf88c2000 serio_raw 3358 0 - Live 0xf88ad000 libphy 13565 1 tg3, Live 0xf889f000 pcspkr 1375 0 - Live 0xf888b000 ext4 331529 2 - Live 0xf881c000 mbcache 4185 1 ext4, Live 0xf87a6000 jbd2 57914 1 ext4, Live 0xf846f000 crc16 1069 1 ext4, Live 0xf8469000 sr_mod 12668 0 - Live 0xf8460000 cdrom 30893 1 sr_mod, Live 0xf844f000 sd_mod 25091 4 - Live 0xf8439000 ata_piix 18337 3 - Live 0xf80b1000 pata_acpi 2292 0 - Live 0xf803d000 libata 150925 2 ata_piix,pata_acpi, Live 0xf82a5000 scsi_mod 107918 4 sg,sr_mod,sd_mod,libata, Live 0xf819f000 i915 551141 2 - Live 0xf82f3000 drm_kms_helper 23853 1 i915, Live 0xf8048000 drm 144133 3 i915,drm_kms_helper, Live 0xf80ba000 intel_agp 8496 1 i915, Live 0xf8079000 i2c_algo_bit 4263 1 i915, Live 0xf806a000 button 3518 1 i915, Live 0xf8005000 intel_gtt 11097 3 i915,intel_agp, Live 0xf8055000 agpgart 21456 3 drm,intel_agp,intel_gtt, Live 0xf8040000 i2c_core 15857 5 i2c_i801,i915,drm_kms_helper,drm,i2c_algo_bit, Live 0xf802a000 video 9652 1 i915, Live 0xf8018000 [milindm@milindm-desktop linux-2.6.39]$ [milindm@milindm-desktop linux-2.6.39]$ cat /proc/iomem 00000000-0000ffff : reserved 00010000-0009ffff : System RAM 000a0000-000bffff : Video RAM area 000c0000-000c7fff : Video ROM 000f0000-000fffff : reserved 000f0000-000fffff : System ROM 00100000-3f686bff : System RAM 01000000-01331dc0 : Kernel code 01331dc1-0147197f : Kernel data 014e6000-015c9fff : Kernel bss 3f686c00-3f688bff : ACPI Non-volatile Storage 3f688c00-3f68abff : ACPI Tables 3f68ac00-3fffffff : reserved 40000000-401fffff : PCI Bus 0000:02 c0000000-cfffffff : 0000:00:02.0 dfa00000-dfafffff : PCI Bus 0000:04 dfafff00-dfafffff : 0000:04:00.0 dfafff00-dfafffff : 8139too dfb00000-dfbfffff : PCI Bus 0000:03 dfc00000-dfcfffff : PCI Bus 0000:02 dfcf0000-dfcfffff : 0000:02:00.0 dfcf0000-dfcfffff : tg3 dfd00000-dfdfffff : PCI Bus 0000:01 dfebfd00-dfebfdff : 0000:00:1e.2 dfebfd00-dfebfdff : Intel ICH6 dfebfe00-dfebffff : 0000:00:1e.2 dfebfe00-dfebffff : Intel ICH6 dfec0000-dfefffff : 0000:00:02.0 dff00000-dff7ffff : 0000:00:02.0 dff80000-dfffffff : 0000:00:02.1 e0000000-efffffff : PCI MMCONFIG 0000 [bus 00-ff] e0000000-efffffff : reserved e0000000-efffffff : pnp 00:09 fec00000-fed003ff : reserved fec00000-fec003ff : IOAPIC 0 fed00000-fed003ff : HPET 0 fed20000-fed9ffff : reserved fed20000-fed9ffff : pnp 00:08 feda0000-fedacfff : pnp 00:09 fee00000-feefffff : reserved fee00000-feefffff : pnp 00:08 fee00000-fee00fff : Local APIC ffa80800-ffa80bff : 0000:00:1d.7 ffa80800-ffa80bff : ehci_hcd ffb00000-ffffffff : reserved ffb00000-ffbfffff : pnp 00:08 ffc00000-ffffffff : pnp 00:08 [milindm@milindm-desktop linux-2.6.39]$ Regards, Milind </div>