Comment 17 for bug 727620

When I have booted into an evironment where both X server and framebuffer uses intel, sometimes when I try to unload the radeon module it crashes like this:

[ 346.860598] radeon 0000:02:00.0: ffff88014b362000 unpin not necessary
[ 346.860619] BUG: unable to handle kernel paging request at ffffc90022680000
[ 346.861758] IP: [<ffffffffa01f00bc>] rs600_gart_set_page+0x3c/0x50 [radeon]
[ 346.863120] PGD 157818067 PUD 157819067 PMD 14959b067 PTE 0
[ 346.864707] Oops: 0002 [#1] SMP
[ 346.866297] last sysfs file: /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-VGA-1/status
[ 346.867941] CPU 3
[ 346.867963] Modules linked in: cryptd aes_x86_64 aes_generic binfmt_misc parport_pc ppdev dm_crypt wl(P) lib80211 snd_hda_codec_hdmi snd_hda_codec_realtek arc4 snd_hda_intel snd_hda_codec snd_hwdep snd_pcm joydev snd_seq_midi brcm80211(C) snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device sparse_keymap mac80211 cfg80211 uvcvideo videodev psmouse snd v4l2_compat_ioctl32 intel_ips serio_raw lp soundcore snd_page_alloc parport radeon(-) i915 ttm ahci atl1c libahci drm_kms_helper drm i2c_algo_bit video
[ 346.877408]
[ 346.879334] Pid: 2518, comm: rmmod Tainted: P C 2.6.38-7-generic #38-Ubuntu Acer Aspire 3820/JM31_CP
[ 346.881377] RIP: 0010:[<ffffffffa01f00bc>] [<ffffffffa01f00bc>] rs600_gart_set_page+0x3c/0x50 [radeon]
[ 346.883456] RSP: 0018:ffff8801259e7c68 EFLAGS: 00010286
[ 346.885512] RAX: 00000000ffffffea RBX: ffff880149e00000 RCX: ffffc90022680000
[ 346.887607] RDX: 0000000036822067 RSI: 0000000000000000 RDI: ffff880149e00000
[ 346.889724] RBP: ffff8801259e7c68 R08: 0000000000000000 R09: ffff88014adf7748
[ 346.891854] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000111
[ 346.893993] R13: 0000000000000111 R14: 0000000000000888 R15: 0000000000000001
[ 346.896139] FS: 00007f8e31ee8720(0000) GS:ffff880093180000(0000) knlGS:0000000000000000
[ 346.898319] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 346.900511] CR2: ffffc90022680000 CR3: 0000000125af6000 CR4: 00000000000006e0
[ 346.902754] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 346.905025] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 346.907314] Process rmmod (pid: 2518, threadinfo ffff8801259e6000, task ffff88013d67c440)
[ 346.909638] Stack:
[ 346.911920] ffff8801259e7cb8 ffffffffa01bf146 ffff880149e01338 0002000000000000
[ 346.914277] ffff8801259e7cb8 ffff880149e00000 ffff88014f0c6000 ffffffffa025a590
[ 346.916600] ffff88014f80e000 0000000000000001 ffff8801259e7cd8 ffffffffa01bf49d
[ 346.918952] Call Trace:
[ 346.921281] [<ffffffffa01bf146>] radeon_gart_unbind+0xb6/0x160 [radeon]
[ 346.923664] [<ffffffffa01bf49d>] radeon_gart_fini+0x7d/0x80 [radeon]
[ 346.926056] [<ffffffffa022a146>] evergreen_pcie_gart_fini+0x26/0x30 [radeon]
[ 346.928466] [<ffffffffa022dc8e>] evergreen_fini+0x3e/0x90 [radeon]
[ 346.930871] [<ffffffffa01a5b0b>] radeon_device_fini+0x3b/0xa0 [radeon]
[ 346.933291] [<ffffffffa01a7045>] radeon_driver_unload_kms+0x35/0x60 [radeon]
[ 346.935709] [<ffffffffa0020b16>] drm_put_dev+0xc6/0x1d0 [drm]
[ 346.938125] [<ffffffffa018b11d>] radeon_pci_remove+0x1d/0x20 [radeon]
[ 346.940534] [<ffffffff813000d2>] pci_device_remove+0x52/0x120
[ 346.942925] [<ffffffff813b90f5>] __device_release_driver+0x75/0xe0
[ 346.945297] [<ffffffff813b9878>] driver_detach+0xc8/0xd0
[ 346.947672] [<ffffffff813b8f59>] bus_remove_driver+0x79/0xd0
[ 346.950054] [<ffffffff813b9912>] driver_unregister+0x62/0xa0
[ 346.952447] [<ffffffff813001e5>] pci_unregister_driver+0x45/0xc0
[ 346.954863] [<ffffffffa001a62c>] drm_exit+0x8c/0x90 [drm]
[ 346.957300] [<ffffffffa023787b>] radeon_exit+0x15/0x79a [radeon]
[ 346.959711] [<ffffffff810a358d>] sys_delete_module+0x18d/0x260
[ 346.962128] [<ffffffff815c1bd5>] ? page_fault+0x25/0x30
[ 346.964505] [<ffffffff8100c002>] system_call_fastpath+0x16/0x1b
[ 346.966873] Code: 50 03 00 00 85 f6 79 07 c9 c3 0f 1f 44 00 00 3b b7 38 03 00 00 77 f1 c1 e6 03 48 81 e2 00 f0 ff ff 48 63 f6 48 83 ca 67 48 01 f1 <48> 89 11 31 c0 c9 c3 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 55
[ 346.972557] RIP [<ffffffffa01f00bc>] rs600_gart_set_page+0x3c/0x50 [radeon]
[ 346.975233] RSP <ffff8801259e7c68>
[ 346.977836] CR2: ffffc90022680000
[ 346.980370] ---[ end trace 1d85aaf7d2addf05 ]---

I am running the xorg-edgers repo. Should I file another bug and if so, where and to what project? This is kind of part of the crashing lifecycle for my notebook atm...