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...