From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 73449] New: WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/ttm/ttm_page_alloc_dma.c:533 and WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/drm_mm.c:578 Date: Thu, 09 Jan 2014 20:38:50 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1624746546==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 7E437FBFC7 for ; Thu, 9 Jan 2014 12:38:50 -0800 (PST) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dri-devel-bounces@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============1624746546== Content-Type: multipart/alternative; boundary="1389299930.AE2b6dd0.15123"; charset="us-ascii" --1389299930.AE2b6dd0.15123 Date: Thu, 9 Jan 2014 20:38:50 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=73449 Priority: medium Bug ID: 73449 Assignee: dri-devel@lists.freedesktop.org Summary: WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/ttm/ttm_page_alloc_dma.c:533 and WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/drm_mm.c:578 Severity: normal Classification: Unclassified OS: All Reporter: gsingh_2011@yahoo.com Hardware: Other Status: NEW Version: XOrg CVS Component: DRM/Radeon Product: DRI I'm running Arch Linux. When I run dmesg, I see the following warnings: [ 38.904494] radeon: switched off [ 38.904530] [drm] Disabling audio 0 support [ 38.978265] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=none,decodes=io+mem:owns=none [ 38.978931] [drm] radeon: finishing device. [ 38.980108] radeon 0000:01:00.0: ffff880097f6b000 unpin not necessary [ 38.986652] ------------[ cut here ]------------ [ 38.986671] WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/drm_mm.c:578 drm_mm_takedown+0x2e/0x30 [drm]() [ 38.986672] Memory manager not clean during takedown. [ 38.986673] Modules linked in: fuse xt_LOG xt_limit xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter iptable_raw ip_tables x_tables vsock hp_wmi sparse_keymap uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core x86_pkg_temp_thermal videodev intel_powerclamp media coretemp kvm_intel kvm crct10dif_pclmul btusb bluetooth crct10dif_common joydev crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel arc4 iwldvm mac80211 aes_x86_64 lrw radeon ttm gf128mul glue_helper ablk_helper cryptd iTCO_wdt iTCO_vendor_support i915 snd_hda_codec_hdmi r8169 mii rtsx_pci_ms memstick evdev iwlwifi cfg80211 rfkill intel_agp intel_gtt drm_kms_helper drm ac battery snd_hda_codec_idt lpc_ich wmi hp_accel thermal lis3lv02d psmouse input_polldev i2c_algo_bit snd_hda_intel processor [ 38.986706] button video i2c_i801 i2c_core shpchp mei_me mei snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_timer snd soundcore serio_raw microcode vboxdrv(O) ext4 crc16 mbcache jbd2 sr_mod sd_mod cdrom rtsx_pci_sdmmc ahci libahci libata sdhci_pci sdhci ehci_pci xhci_hcd ehci_hcd scsi_mod mmc_core rtsx_pci usbcore usb_common [ 38.986727] CPU: 0 PID: 65 Comm: kworker/0:2 Tainted: G O 3.12.6-1-ARCH #1 [ 38.986729] Hardware name: Hewlett-Packard HP Pavilion dv6 Notebook PC/17F9, BIOS F.12 10/26/2011 [ 38.986733] Workqueue: kacpi_hotplug hotplug_event_work [ 38.986735] 0000000000000009 ffff880253321a48 ffffffff814ee4fb ffff880253321a90 [ 38.986738] ffff880253321a80 ffffffff81062bcd ffff8800986ee600 ffff8800986ee6a8 [ 38.986740] ffff88024fc54ae8 ffffffffa0938e80 ffff880253d3d000 ffff880253321ae0 [ 38.986742] Call Trace: [ 38.986747] [] dump_stack+0x54/0x8d [ 38.986751] [] warn_slowpath_common+0x7d/0xa0 [ 38.986754] [] warn_slowpath_fmt+0x4c/0x50 [ 38.986759] [] ? ttm_bo_release+0x185/0x2b0 [ttm] [ 38.986762] [] ? ttm_bo_man_takedown+0x48/0x70 [ttm] [ 38.986767] [] drm_mm_takedown+0x2e/0x30 [drm] [ 38.986770] [] ttm_bo_man_takedown+0x38/0x70 [ttm] [ 38.986774] [] ttm_bo_clean_mm+0x49/0x80 [ttm] [ 38.986784] [] radeon_ttm_fini+0xbd/0x190 [radeon] [ 38.986793] [] radeon_bo_fini+0x12/0x20 [radeon] [ 38.986805] [] evergreen_fini+0xa3/0xd0 [radeon] [ 38.986811] [] radeon_device_fini+0x3e/0x120 [radeon] [ 38.986818] [] radeon_driver_unload_kms+0x3d/0x60 [radeon] [ 38.986824] [] drm_put_dev+0x63/0x1b0 [drm] [ 38.986829] [] radeon_pci_remove+0x1d/0x20 [radeon] [ 38.986833] [] pci_device_remove+0x3b/0xb0 [ 38.986836] [] __device_release_driver+0x7f/0xf0 [ 38.986839] [] device_release_driver+0x23/0x30 [ 38.986841] [] bus_remove_device+0x108/0x180 [ 38.986843] [] device_del+0x135/0x1d0 [ 38.986845] [] pci_stop_bus_device+0x94/0xa0 [ 38.986847] [] pci_stop_and_remove_bus_device+0x12/0x20 [ 38.986850] [] disable_slot+0x76/0xd0 [ 38.986852] [] acpiphp_check_bridge+0xa8/0xd0 [ 38.986855] [] hotplug_event+0x102/0x250 [ 38.986857] [] hotplug_event_work+0x27/0x70 [ 38.986859] [] process_one_work+0x167/0x450 [ 38.986861] [] worker_thread+0x121/0x3a0 [ 38.986864] [] ? manage_workers.isra.23+0x2b0/0x2b0 [ 38.986866] [] kthread+0xc0/0xd0 [ 38.986869] [] ? kthread_create_on_node+0x120/0x120 [ 38.986871] [] ret_from_fork+0x7c/0xb0 [ 38.986874] [] ? kthread_create_on_node+0x120/0x120 [ 38.986875] ---[ end trace 482ec37d2a89ca94 ]--- [ 38.986882] [TTM] Finalizing pool allocator [ 38.986885] [TTM] Finalizing DMA pool allocator [ 38.986889] ------------[ cut here ]------------ [ 38.986892] WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/ttm/ttm_page_alloc_dma.c:533 ttm_dma_free_pool+0x12b/0x130 [ttm]() [ 38.986893] Modules linked in: fuse xt_LOG xt_limit xt_tcpudp nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter iptable_raw ip_tables x_tables vsock hp_wmi sparse_keymap uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core x86_pkg_temp_thermal videodev intel_powerclamp media coretemp kvm_intel kvm crct10dif_pclmul btusb bluetooth crct10dif_common joydev crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel arc4 iwldvm mac80211 aes_x86_64 lrw radeon ttm gf128mul glue_helper ablk_helper cryptd iTCO_wdt iTCO_vendor_support i915 snd_hda_codec_hdmi r8169 mii rtsx_pci_ms memstick evdev iwlwifi cfg80211 rfkill intel_agp intel_gtt drm_kms_helper drm ac battery snd_hda_codec_idt lpc_ich wmi hp_accel thermal lis3lv02d psmouse input_polldev i2c_algo_bit snd_hda_intel processor [ 38.986921] button video i2c_i801 i2c_core shpchp mei_me mei snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_timer snd soundcore serio_raw microcode vboxdrv(O) ext4 crc16 mbcache jbd2 sr_mod sd_mod cdrom rtsx_pci_sdmmc ahci libahci libata sdhci_pci sdhci ehci_pci xhci_hcd ehci_hcd scsi_mod mmc_core rtsx_pci usbcore usb_common [ 38.986936] CPU: 0 PID: 65 Comm: kworker/0:2 Tainted: G W O 3.12.6-1-ARCH #1 [ 38.986938] Hardware name: Hewlett-Packard HP Pavilion dv6 Notebook PC/17F9, BIOS F.12 10/26/2011 [ 38.986940] Workqueue: kacpi_hotplug hotplug_event_work [ 38.986941] 0000000000000009 ffff880253321a40 ffffffff814ee4fb 0000000000000000 [ 38.986943] ffff880253321a78 ffffffff81062bcd ffff88024fe01000 ffff880253e38290 [ 38.986945] 0000000000000008 ffffffffa0938e80 ffff880253d3d000 ffff880253321a88 [ 38.986947] Call Trace: [ 38.986949] [] dump_stack+0x54/0x8d [ 38.986952] [] warn_slowpath_common+0x7d/0xa0 [ 38.986955] [] warn_slowpath_null+0x1a/0x20 [ 38.986958] [] ttm_dma_free_pool+0x12b/0x130 [ttm] [ 38.986961] [] ttm_dma_page_alloc_fini+0x8e/0x104 [ttm] [ 38.986965] [] ttm_mem_global_release+0x19/0x90 [ttm] [ 38.986972] [] radeon_ttm_mem_global_release+0x12/0x20 [radeon] [ 38.986977] [] drm_global_item_unref+0x53/0x80 [drm] [ 38.986985] [] radeon_ttm_fini+0xee/0x190 [radeon] [ 38.986993] [] radeon_bo_fini+0x12/0x20 [radeon] [ 38.987004] [] evergreen_fini+0xa3/0xd0 [radeon] [ 38.987010] [] radeon_device_fini+0x3e/0x120 [radeon] [ 38.987016] [] radeon_driver_unload_kms+0x3d/0x60 [radeon] [ 38.987022] [] drm_put_dev+0x63/0x1b0 [drm] [ 38.987027] [] radeon_pci_remove+0x1d/0x20 [radeon] [ 38.987030] [] pci_device_remove+0x3b/0xb0 [ 38.987033] [] __device_release_driver+0x7f/0xf0 [ 38.987035] [] device_release_driver+0x23/0x30 [ 38.987037] [] bus_remove_device+0x108/0x180 [ 38.987039] [] device_del+0x135/0x1d0 [ 38.987041] [] pci_stop_bus_device+0x94/0xa0 [ 38.987043] [] pci_stop_and_remove_bus_device+0x12/0x20 [ 38.987045] [] disable_slot+0x76/0xd0 [ 38.987048] [] acpiphp_check_bridge+0xa8/0xd0 [ 38.987050] [] hotplug_event+0x102/0x250 [ 38.987053] [] hotplug_event_work+0x27/0x70 [ 38.987055] [] process_one_work+0x167/0x450 [ 38.987057] [] worker_thread+0x121/0x3a0 [ 38.987059] [] ? manage_workers.isra.23+0x2b0/0x2b0 [ 38.987061] [] kthread+0xc0/0xd0 [ 38.987064] [] ? kthread_create_on_node+0x120/0x120 [ 38.987066] [] ret_from_fork+0x7c/0xb0 [ 38.987068] [] ? kthread_create_on_node+0x120/0x120 [ 38.987069] ---[ end trace 482ec37d2a89ca95 ]--- [ 38.987095] [TTM] Zone kernel: Used memory at exit: 13 kiB [ 38.987097] [TTM] Zone dma32: Used memory at exit: 9 kiB [ 38.987099] [drm] radeon: ttm finalized [ 38.987102] vga_switcheroo: disabled I also can't see my ATI Radeon graphics card with lspci, I'm not sure if that's related to this. In Ubuntu, this is what lspci shows for my graphics card: 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Seymour [Radeon HD 6400M/7400M Series] (rev ff) I have libdrm 2.4.51-1 installed. -- You are receiving this mail because: You are the assignee for the bug. --1389299930.AE2b6dd0.15123 Date: Thu, 9 Jan 2014 20:38:50 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"
Priority medium
Bug ID 73449
Assignee dri-devel@lists.freedesktop.org
Summary WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/ttm/ttm_page_alloc_dma.c:533 and WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/drm_mm.c:578
Severity normal
Classification Unclassified
OS All
Reporter gsingh_2011@yahoo.com
Hardware Other
Status NEW
Version XOrg CVS
Component DRM/Radeon
Product DRI 

I'm running Arch Linux. When I run dmesg, I see the following warnings:

[   38.904494] radeon: switched off
[   38.904530] [drm] Disabling audio 0 support
[   38.978265] vgaarb: device changed decodes:
PCI:0000:00:02.0,olddecodes=none,decodes=io+mem:owns=none
[   38.978931] [drm] radeon: finishing device.
[   38.980108] radeon 0000:01:00.0: ffff880097f6b000 unpin not necessary
[   38.986652] ------------[ cut here ]------------
[   38.986671] WARNING: CPU: 0 PID: 65 at drivers/gpu/drm/drm_mm.c:578
drm_mm_takedown+0x2e/0x30 [drm]()
[   38.986672] Memory manager not clean during takedown.
[   38.986673] Modules linked in: fuse xt_LOG xt_limit xt_tcpudp
nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter
iptable_raw ip_tables x_tables vsock hp_wmi sparse_keymap uvcvideo
videobuf2_vmalloc videobuf2_memops videobuf2_core x86_pkg_temp_thermal videodev
intel_powerclamp media coretemp kvm_intel kvm crct10dif_pclmul btusb bluetooth
crct10dif_common joydev crc32_pclmul crc32c_intel ghash_clmulni_intel
aesni_intel arc4 iwldvm mac80211 aes_x86_64 lrw radeon ttm gf128mul glue_helper
ablk_helper cryptd iTCO_wdt iTCO_vendor_support i915 snd_hda_codec_hdmi r8169
mii rtsx_pci_ms memstick evdev iwlwifi cfg80211 rfkill intel_agp intel_gtt
drm_kms_helper drm ac battery snd_hda_codec_idt lpc_ich wmi hp_accel thermal
lis3lv02d psmouse input_polldev i2c_algo_bit snd_hda_intel processor
[   38.986706]  button video i2c_i801 i2c_core shpchp mei_me mei snd_hda_codec
snd_hwdep snd_pcm snd_page_alloc snd_timer snd soundcore serio_raw microcode
vboxdrv(O) ext4 crc16 mbcache jbd2 sr_mod sd_mod cdrom rtsx_pci_sdmmc ahci
libahci libata sdhci_pci sdhci ehci_pci xhci_hcd ehci_hcd scsi_mod mmc_core
rtsx_pci usbcore usb_common
[   38.986727] CPU: 0 PID: 65 Comm: kworker/0:2 Tainted: G           O
3.12.6-1-ARCH #1
[   38.986729] Hardware name: Hewlett-Packard HP Pavilion dv6 Notebook PC/17F9,
BIOS F.12 10/26/2011
[   38.986733] Workqueue: kacpi_hotplug hotplug_event_work
[   38.986735]  0000000000000009 ffff880253321a48 ffffffff814ee4fb
ffff880253321a90
[   38.986738]  ffff880253321a80 ffffffff81062bcd ffff8800986ee600
ffff8800986ee6a8
[   38.986740]  ffff88024fc54ae8 ffffffffa0938e80 ffff880253d3d000
ffff880253321ae0
[   38.986742] Call Trace:
[   38.986747]  [<ffffffff814ee4fb>] dump_stack+0x54/0x8d
[   38.986751]  [<ffffffff81062bcd>] warn_slowpath_common+0x7d/0xa0
[   38.986754]  [<ffffffff81062c3c>] warn_slowpath_fmt+0x4c/0x50
[   38.986759]  [<ffffffffa01405b5>] ? ttm_bo_release+0x185/0x2b0 [ttm]
[   38.986762]  [<ffffffffa0147068>] ? ttm_bo_man_takedown+0x48/0x70 [ttm]
[   38.986767]  [<ffffffffa05e44ae>] drm_mm_takedown+0x2e/0x30 [drm]
[   38.986770]  [<ffffffffa0147058>] ttm_bo_man_takedown+0x38/0x70 [ttm]
[   38.986774]  [<ffffffffa0141c19>] ttm_bo_clean_mm+0x49/0x80 [ttm]
[   38.986784]  [<ffffffffa083eb2d>] radeon_ttm_fini+0xbd/0x190 [radeon]
[   38.986793]  [<ffffffffa083f5e2>] radeon_bo_fini+0x12/0x20 [radeon]
[   38.986805]  [<ffffffffa08897b3>] evergreen_fini+0xa3/0xd0 [radeon]
[   38.986811]  [<ffffffffa0823cce>] radeon_device_fini+0x3e/0x120 [radeon]
[   38.986818]  [<ffffffffa0825b2d>] radeon_driver_unload_kms+0x3d/0x60
[radeon]
[   38.986824]  [<ffffffffa05dfe53>] drm_put_dev+0x63/0x1b0 [drm]
[   38.986829]  [<ffffffffa082206d>] radeon_pci_remove+0x1d/0x20 [radeon]
[   38.986833]  [<ffffffff812c4c1b>] pci_device_remove+0x3b/0xb0
[   38.986836]  [<ffffffff81389e5f>] __device_release_driver+0x7f/0xf0
[   38.986839]  [<ffffffff81389ef3>] device_release_driver+0x23/0x30
[   38.986841]  [<ffffffff81389688>] bus_remove_device+0x108/0x180
[   38.986843]  [<ffffffff81386025>] device_del+0x135/0x1d0
[   38.986845]  [<ffffffff812bf2c4>] pci_stop_bus_device+0x94/0xa0
[   38.986847]  [<ffffffff812bf3d2>] pci_stop_and_remove_bus_device+0x12/0x20
[   38.986850]  [<ffffffff812dc996>] disable_slot+0x76/0xd0
[   38.986852]  [<ffffffff812dca98>] acpiphp_check_bridge+0xa8/0xd0
[   38.986855]  [<ffffffff812dd032>] hotplug_event+0x102/0x250
[   38.986857]  [<ffffffff812dd1a7>] hotplug_event_work+0x27/0x70
[   38.986859]  [<ffffffff8107dbc7>] process_one_work+0x167/0x450
[   38.986861]  [<ffffffff8107e5d1>] worker_thread+0x121/0x3a0
[   38.986864]  [<ffffffff8107e4b0>] ? manage_workers.isra.23+0x2b0/0x2b0
[   38.986866]  [<ffffffff81084fe0>] kthread+0xc0/0xd0
[   38.986869]  [<ffffffff81084f20>] ? kthread_create_on_node+0x120/0x120
[   38.986871]  [<ffffffff814fcffc>] ret_from_fork+0x7c/0xb0
[   38.986874]  [<ffffffff81084f20>] ? kthread_create_on_node+0x120/0x120
[   38.986875] ---[ end trace 482ec37d2a89ca94 ]---
[   38.986882] [TTM] Finalizing pool allocator
[   38.986885] [TTM] Finalizing DMA pool allocator
[   38.986889] ------------[ cut here ]------------
[   38.986892] WARNING: CPU: 0 PID: 65 at
drivers/gpu/drm/ttm/ttm_page_alloc_dma.c:533 ttm_dma_free_pool+0x12b/0x130
[ttm]()
[   38.986893] Modules linked in: fuse xt_LOG xt_limit xt_tcpudp
nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack iptable_filter
iptable_raw ip_tables x_tables vsock hp_wmi sparse_keymap uvcvideo
videobuf2_vmalloc videobuf2_memops videobuf2_core x86_pkg_temp_thermal videodev
intel_powerclamp media coretemp kvm_intel kvm crct10dif_pclmul btusb bluetooth
crct10dif_common joydev crc32_pclmul crc32c_intel ghash_clmulni_intel
aesni_intel arc4 iwldvm mac80211 aes_x86_64 lrw radeon ttm gf128mul glue_helper
ablk_helper cryptd iTCO_wdt iTCO_vendor_support i915 snd_hda_codec_hdmi r8169
mii rtsx_pci_ms memstick evdev iwlwifi cfg80211 rfkill intel_agp intel_gtt
drm_kms_helper drm ac battery snd_hda_codec_idt lpc_ich wmi hp_accel thermal
lis3lv02d psmouse input_polldev i2c_algo_bit snd_hda_intel processor
[   38.986921]  button video i2c_i801 i2c_core shpchp mei_me mei snd_hda_codec
snd_hwdep snd_pcm snd_page_alloc snd_timer snd soundcore serio_raw microcode
vboxdrv(O) ext4 crc16 mbcache jbd2 sr_mod sd_mod cdrom rtsx_pci_sdmmc ahci
libahci libata sdhci_pci sdhci ehci_pci xhci_hcd ehci_hcd scsi_mod mmc_core
rtsx_pci usbcore usb_common
[   38.986936] CPU: 0 PID: 65 Comm: kworker/0:2 Tainted: G        W  O
3.12.6-1-ARCH #1
[   38.986938] Hardware name: Hewlett-Packard HP Pavilion dv6 Notebook PC/17F9,
BIOS F.12 10/26/2011
[   38.986940] Workqueue: kacpi_hotplug hotplug_event_work
[   38.986941]  0000000000000009 ffff880253321a40 ffffffff814ee4fb
0000000000000000
[   38.986943]  ffff880253321a78 ffffffff81062bcd ffff88024fe01000
ffff880253e38290
[   38.986945]  0000000000000008 ffffffffa0938e80 ffff880253d3d000
ffff880253321a88
[   38.986947] Call Trace:
[   38.986949]  [<ffffffff814ee4fb>] dump_stack+0x54/0x8d
[   38.986952]  [<ffffffff81062bcd>] warn_slowpath_common+0x7d/0xa0
[   38.986955]  [<ffffffff81062caa>] warn_slowpath_null+0x1a/0x20
[   38.986958]  [<ffffffffa014784b>] ttm_dma_free_pool+0x12b/0x130 [ttm]
[   38.986961]  [<ffffffffa014899e>] ttm_dma_page_alloc_fini+0x8e/0x104 [ttm]
[   38.986965]  [<ffffffffa013e549>] ttm_mem_global_release+0x19/0x90 [ttm]
[   38.986972]  [<ffffffffa083d7f2>] radeon_ttm_mem_global_release+0x12/0x20
[radeon]
[   38.986977]  [<ffffffffa05f1553>] drm_global_item_unref+0x53/0x80 [drm]
[   38.986985]  [<ffffffffa083eb5e>] radeon_ttm_fini+0xee/0x190 [radeon]
[   38.986993]  [<ffffffffa083f5e2>] radeon_bo_fini+0x12/0x20 [radeon]
[   38.987004]  [<ffffffffa08897b3>] evergreen_fini+0xa3/0xd0 [radeon]
[   38.987010]  [<ffffffffa0823cce>] radeon_device_fini+0x3e/0x120 [radeon]
[   38.987016]  [<ffffffffa0825b2d>] radeon_driver_unload_kms+0x3d/0x60
[radeon]
[   38.987022]  [<ffffffffa05dfe53>] drm_put_dev+0x63/0x1b0 [drm]
[   38.987027]  [<ffffffffa082206d>] radeon_pci_remove+0x1d/0x20 [radeon]
[   38.987030]  [<ffffffff812c4c1b>] pci_device_remove+0x3b/0xb0
[   38.987033]  [<ffffffff81389e5f>] __device_release_driver+0x7f/0xf0
[   38.987035]  [<ffffffff81389ef3>] device_release_driver+0x23/0x30
[   38.987037]  [<ffffffff81389688>] bus_remove_device+0x108/0x180
[   38.987039]  [<ffffffff81386025>] device_del+0x135/0x1d0
[   38.987041]  [<ffffffff812bf2c4>] pci_stop_bus_device+0x94/0xa0
[   38.987043]  [<ffffffff812bf3d2>] pci_stop_and_remove_bus_device+0x12/0x20
[   38.987045]  [<ffffffff812dc996>] disable_slot+0x76/0xd0
[   38.987048]  [<ffffffff812dca98>] acpiphp_check_bridge+0xa8/0xd0
[   38.987050]  [<ffffffff812dd032>] hotplug_event+0x102/0x250
[   38.987053]  [<ffffffff812dd1a7>] hotplug_event_work+0x27/0x70
[   38.987055]  [<ffffffff8107dbc7>] process_one_work+0x167/0x450
[   38.987057]  [<ffffffff8107e5d1>] worker_thread+0x121/0x3a0
[   38.987059]  [<ffffffff8107e4b0>] ? manage_workers.isra.23+0x2b0/0x2b0
[   38.987061]  [<ffffffff81084fe0>] kthread+0xc0/0xd0
[   38.987064]  [<ffffffff81084f20>] ? kthread_create_on_node+0x120/0x120
[   38.987066]  [<ffffffff814fcffc>] ret_from_fork+0x7c/0xb0
[   38.987068]  [<ffffffff81084f20>] ? kthread_create_on_node+0x120/0x120
[   38.987069] ---[ end trace 482ec37d2a89ca95 ]---
[   38.987095] [TTM] Zone  kernel: Used memory at exit: 13 kiB
[   38.987097] [TTM] Zone   dma32: Used memory at exit: 9 kiB
[   38.987099] [drm] radeon: ttm finalized
[   38.987102] vga_switcheroo: disabled

I also can't see my ATI Radeon graphics card with lspci, I'm not sure if that's
related to this. In Ubuntu, this is what lspci shows for my graphics card:

01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Seymour
[Radeon HD 6400M/7400M Series] (rev ff)

I have libdrm 2.4.51-1 installed.

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