abrt version: 2.0.1
architecture:   x86_64
cmdline:        ro root=/dev/mapper/vg_snuggles-lv_root rd_LVM_LV=vg_snuggles/lv_root rd_LVM_LV=vg_snuggles/lv_swap rd_NO_LUKS rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=de rhgb quiet
component:      kernel
kernel:         2.6.38.7-30.fc15.x86_64
os_release:     Fedora release 15 (Lovelock)
package:        kernel
reason:         kernel BUG at drivers/gpu/drm/i915/i915_gem.c:3252!
reported_to:    kerneloops: URL=http://submit.kerneloops.org/submitoops.php
time:           Thu Jun  9 19:07:53 2011

backtrace:
:kernel BUG at drivers/gpu/drm/i915/i915_gem.c:3252!
:invalid opcode: 0000 [#1] SMP 
:last sysfs file: /sys/devices/system/cpu/cpu1/cache/index2/shared_cpu_map
:CPU 0 
:Modules linked in: fuse 8021q garp stp llc cpufreq_ondemand acpi_cpufreq freq_table mperf ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables rfcomm sco bnep l2cap arc4 btusb bluetooth snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device iwlagn snd_pcm iwlcore microcode thinkpad_acpi mac80211 iTCO_wdt i2c_i801 joydev cfg80211 e1000e iTCO_vendor_support snd_timer rfkill snd soundcore snd_page_alloc wmi ipv6 firewire_ohci firewire_core crc_itu_t yenta_socket i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last unloaded: scsi_wait_scan]
:Pid: 1528, comm: gnome-shell Not tainted 2.6.38.7-30.fc15.x86_64 #1 LENOVO 7661WGZ/7661WGZ
:RIP: 0010:[<ffffffffa007d5fe>]  [<ffffffffa007d5fe>] i915_gem_object_pin+0x3a/0x13c [i915]
:RSP: 0018:ffff880119a71ba8  EFLAGS: 00010246
:RAX: 000000000001e000 RBX: ffff88011c613000 RCX: 0000000000000001
:RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88011c613000
:RBP: ffff880119a71bd8 R08: ffff88012fa2d5d8 R09: 0000000000001b0f
:R10: 0000000000000000 R11: 0000000000000040 R12: 0000000000000000
:R13: ffff880119a71c00 R14: ffff88012fa2c000 R15: ffff880119a71d00
:FS:  00007f0ce4ca09c0(0000) GS:ffff8800bf400000(0000) knlGS:0000000000000000
:CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
:CR2: 00007f0cd959800c CR3: 000000011c708000 CR4: 00000000000006f0
:DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
:DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
:Process gnome-shell (pid: 1528, threadinfo ffff880119a70000, task ffff880131cfae60)
:Stack:
: 0000000000000040 ffff880119a71c98 ffff88011c613000 ffff880119a71d00
: ffff880119a71c08 0000000000000000 ffff880119a71c48 ffffffffa007f7ba
: 0000000000000108 0000000000000246 ffff880119a71c48 ffff88012fa2c030
:Call Trace:
: [<ffffffffa007f7ba>] i915_gem_execbuffer_reserve+0x12e/0x2fc [i915]
: [<ffffffffa008013f>] i915_gem_do_execbuffer+0x485/0x1178 [i915]
: [<ffffffff8104127e>] ? should_resched+0xe/0x2d
: [<ffffffffa008111b>] i915_gem_execbuffer2+0xcc/0x12d [i915]
: [<ffffffff8104127e>] ? should_resched+0xe/0x2d
: [<ffffffffa0023861>] drm_ioctl+0x29e/0x37b [drm]
: [<ffffffff811eb273>] ? inode_has_perm+0x76/0x8c
: [<ffffffffa008104f>] ? i915_gem_execbuffer2+0x0/0x12d [i915]
: [<ffffffff811eb32d>] ? file_has_perm+0xa4/0xc6
: [<ffffffff8112f51c>] do_vfs_ioctl+0x47e/0x4bf
: [<ffffffff8112f5b3>] sys_ioctl+0x56/0x7b
: [<ffffffff81009bc2>] system_call_fastpath+0x16/0x1b
:Code: 0f 1f 44 00 00 48 8b 47 08 48 89 fb 41 89 f4 41 88 d5 4c 8b b0 50 03 00 00 8b 87 e0 00 00 00 25 00 e0 01 00 3d 00 e0 01 00 75 02 <0f> 0b 48 83 bf 88 00 00 00 00 74 68 85 f6 74 0d 41 8d 54 24 ff 
:RIP  [<ffffffffa007d5fe>] i915_gem_object_pin+0x3a/0x13c [i915]
: RSP <ffff880119a71ba8>

comment:
:i installed the nvidia driver for my graphic card. the whole graphics couldn't be shown except of the login screen. login wasn't possible thru the GUI.
:i deleted the drivers via command-line (ctrl+alt+f2), which worked.

event_log:
:2011-06-10-16:04:17> Submitting oops report to http://submit.kerneloops.org/submitoops.php
:2011-06-10-16:04:26  Kernel oops report was uploaded