https://bugzilla.kernel.org/show_bug.cgi?id=79501

            Bug ID: 79501
           Summary: BUG: unable to handle kernel paging request at
                    48d8ff05
           Product: ACPI
           Version: 2.5
    Kernel Version: 3.14.9
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: ACPICA-Core
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Using the ASRock E350M1 [1] and Debian GNU/Linux Sid/unstable, starting the
system with the internal graphics device, KMS did not work and only the console
was shown (low resolution) and as a result of the KMS failure X did not start
either.

$ uname -a
Linux myhostname 3.14-1-686-pae #1 SMP Debian 3.14.9-1 (2014-06-30) i686
GNU/Linux
$ more /var/log/syslog
[…]
[   53.530560] [Firmware Bug]: ACPI: No _BQC method, cannot determine initial
brightness
[   53.530714] BUG: unable to handle kernel paging request at 48d8ff05
[   53.537149] IP: [<c129d5ad>] acpi_ex_system_memory_space_handler+0x1b3/0x1ee
[   53.544309] *pdpt = 0000000036c8d001 *pde = 0000000000000000 
[   53.550202] Oops: 0002 [#1] SMP 
[   53.553583] Modules linked in: video(+) button thermal_sys ext4 crc16
mbcache jbd2 crc32c btrfs xor raid6_pq sha256_generic cbc dm_crypt hid_generic
usbhid hid dm_mod raid1 md_mod sg sd_mod crc_t10dif crct10dif_generic
crct10dif_common ata_generic ohci_pci r8169 mii pata_atiixp sp5100_tco ahci
libahci libata ohci_hcd scsi_mod ehci_pci ehci_hcd usbcore usb_common
[   53.587828] CPU: 0 PID: 427 Comm: udevd Not tainted 3.14-1-686-pae #1 Debian
3.14.9-1
[   53.595711] Hardware name: To Be Filled By O.E.M. To Be Filled By
O.E.M./E350M1, BIOS P1.80 12/21/2012
[   53.605063] task: f774fa90 ti: f6b58000 task.ti: f6b58000
[   53.610507] EIP: 0060:[<c129d5ad>] EFLAGS: 00010246 CPU: 0
[   53.616037] EIP is at acpi_ex_system_memory_space_handler+0x1b3/0x1ee
[   53.622517] EAX: 00000001 EBX: 00000008 ECX: 000000fb EDX: 00000008
[   53.628827] ESI: f6d16260 EDI: 48d8ff05 EBP: f6b59a4c ESP: f6b59944
[   53.635136]  DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[   53.640578] CR0: 80050033 CR2: 48d8ff05 CR3: 36890000 CR4: 000007f0
[   53.646889] Stack:
[   53.648948]  00000014 c108bdfb 00000246 000080d0 000080d0 c12aa973 000000fb
00000000
[   53.657147]  00000001 00000000 00000000 f7428df8 f7437b88 f7433828 c129d3fa
c1297758
[   53.665345]  f6b59a4c 00000000 f6d16260 5d8072f5 e410ea65 288d1c25 00000000
f742a768
[   53.673545] Call Trace:
[   53.676039]  [<c108bdfb>] ? up+0xb/0x40
[   53.679919]  [<c12aa973>] ? acpi_ut_release_mutex+0x61/0x70
[   53.685534]  [<c129d3fa>] ? acpi_ex_do_logical_op+0x16c/0x16c
[   53.691324]  [<c1297758>] ? acpi_ev_address_space_dispatch+0x197/0x1e6
[   53.697893]  [<c129a583>] ? acpi_ex_access_region+0x1e0/0x26b
[   53.703684]  [<c129aa0d>] ? acpi_ex_field_datum_io+0x102/0x1cc
[   53.709559]  [<c129abc9>] ? acpi_ex_write_with_update_rule+0xf2/0xf9
[   53.715955]  [<c129a8f2>] ? acpi_ex_insert_into_field+0x2e4/0x2fd
[   53.722092]  [<c129a380>] ? acpi_ex_write_data_to_field+0x187/0x1aa
[   53.728399]  [<c12a0117>] ? acpi_ns_lookup+0x1fb/0x324
[   53.733582]  [<c129e28a>] ? acpi_ex_store_object_to_node+0x9d/0xb0
[   53.739805]  [<c129e34f>] ? acpi_ex_store+0xb2/0x211
[   53.744814]  [<c129ba9d>] ? acpi_ex_opcode_1A_1T_1R+0x44b/0x565
[   53.750778]  [<c129ded9>] ? acpi_ex_resolve_operands+0x1dd/0x4c5
[   53.756825]  [<c1294a93>] ? acpi_ds_exec_end_op+0xbf/0x39f
[   53.762356]  [<c12a4596>] ? acpi_ps_get_next_arg+0x2e1/0x341
[   53.768058]  [<c12877c7>] ? acpi_os_release_object+0x5/0x8
[   53.773588]  [<c12a56b6>] ? acpi_ps_append_arg+0x16/0x76
[   53.778942]  [<c12a4a96>] ? acpi_ps_parse_loop+0x4a0/0x4de
[   53.784473]  [<c12a5396>] ? acpi_ps_parse_aml+0x7d/0x229
[   53.789829]  [<c12a5a2c>] ? acpi_ps_execute_method+0x196/0x234
[   53.795705]  [<c12a0e23>] ? acpi_ns_evaluate+0x1b0/0x23a
[   53.801060]  [<c12a32f7>] ? acpi_evaluate_object+0x112/0x1f3
[   53.806763]  [<c108bdfb>] ? up+0xb/0x40
[   53.810646]  [<c1287751>] ? acpi_os_signal_semaphore+0x17/0x23
[   53.816523]  [<c12a9085>] ? acpi_ut_copy_iobject_to_eobject+0x54/0x71
[   53.823004]  [<c1287b8b>] ? acpi_execute_simple_method+0x4f/0x56
[   53.829057]  [<f840c2e6>] ? acpi_video_device_lcd_set_level+0x26/0xa6
[video]
[   53.836231]  [<f840d5ed>] ? acpi_video_bus_add+0x8ed/0xbf9 [video]
[   53.842453]  [<c11aa860>] ? kernfs_create_link+0x50/0x80
[   53.847809]  [<c11a7b98>] ? sysfs_do_create_link_sd.isra.2+0x48/0x80
[   53.854204]  [<c128a450>] ? acpi_device_probe+0x28/0xbb
[   53.859475]  [<c1301aa8>] ? driver_probe_device+0x68/0x210
[   53.865004]  [<c128a35e>] ? __acpi_match_device+0x21/0x3f
[   53.870446]  [<c1301c80>] ? __device_attach+0x30/0x30
[   53.875542]  [<c1301cf1>] ? __driver_attach+0x71/0x80
[   53.880637]  [<c13003ef>] ? bus_for_each_dev+0x3f/0x70
[   53.885821]  [<c1301696>] ? driver_attach+0x16/0x20
[   53.890743]  [<c1301c80>] ? __device_attach+0x30/0x30
[   53.895839]  [<c130138f>] ? bus_add_driver+0x12f/0x1e0
[   53.901021]  [<c1302201>] ? driver_register+0x51/0xd0
[   53.906119]  [<f840c2a7>] ? acpi_video_register+0x3e/0x57 [video]
[   53.912256]  [<f8412094>] ? acpi_video_init+0x7d/0xfe9 [video]
[   53.918130]  [<f8412017>] ? video_set_use_native_backlight+0xa/0xa [video]
[   53.925046]  [<c10020b1>] ? do_one_initcall+0x51/0x120
[   53.930228]  [<f8412017>] ? video_set_use_native_backlight+0xa/0xa [video]
[   53.937146]  [<c1048828>] ? set_memory_nx+0x58/0x60
[   53.942068]  [<c10b4f6b>] ? load_module+0x185b/0x20b0
[   53.947168]  [<c10b58bc>] ? SyS_finit_module+0x5c/0x70
[   53.952350]  [<c142ec06>] ? sysenter_do_call+0x12/0x16
[   53.957525] Code: 04 89 45 00 89 55 04 eb 53 0f b7 07 eb 02 8b 07 89 45 00
c7 45 04 00 00 00 00 eb 40 83 fb 10 74 25 77 0c 83 fb 08 75 34 8b 45 00 <88> 07
eb 2d 83 fb 20 74 1a 83 fb 40 75 23 8b 45 00 8b 55 04 89
[   53.979705] EIP: [<c129d5ad>]
acpi_ex_system_memory_space_handler+0x1b3/0x1ee SS:ESP 0068:f6b59944
[   53.988814] CR2: 0000000048d8ff05
[   53.992240] ---[ end trace cf5c709a5460b48c ]---
[…]

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