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When an application tries to access /proc/acpi/button/lid/LID/stated it goes to D state.
Eg. cat /proc/acpi/button/lid/LID/stated
F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND
0 0 5625 5574 20 0 3944 224 acpi_e D ? 0:00 cat state
2.6.39-ARCH
acpid 2.0.10-2
As result of the above is that my laptop doesn't goes to sleep when closing the lid.
Does anyone else face this issue?
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I have noticed there is a oops message.
It may have something to do with kworker.
[ 600.306724] INFO: task cat:2389 blocked for more than 120 seconds.
[ 600.306734] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 600.306742] cat D caf53a60 0 2389 1076 0x00000000
[ 600.306757] caf53af4 00000086 c11c143f caf53a60 e0843447 caf53a6c 5750ef8e 0000006a
[ 600.306776] caf53a80 e0841e72 caf53a80 e0841a41 00000000 caf53a94 e0844b50 c152c480
[ 600.306795] de69d390 c152c480 df406480 c9694460 df245a40 de37401c 00000000 0001a0d0
[ 600.306814] Call Trace:
[ 600.306832] [<c11c143f>] ? __const_udelay+0x1f/0x30
[ 600.306877] [<e0843447>] ? ata_sff_pause+0x17/0x20 [libata]
[ 600.306906] [<e0841e72>] ? ata_bmdma_setup+0x62/0x70 [libata]
[ 600.306934] [<e0841a41>] ? ata_bmdma_start+0x21/0x30 [libata]
[ 600.306960] [<e0844b50>] ? ata_bmdma_qc_issue+0xc0/0x170 [libata]
[ 600.306974] [<c10318eb>] ? cpuacct_charge+0x5b/0x70
[ 600.306987] [<c1009a88>] ? sched_clock+0x8/0x10
[ 600.307025] [<e0a3d332>] ? ext4_ext_map_blocks+0x322/0x2230 [ext4]
[ 600.307041] [<c134a2ed>] __mutex_lock_slowpath+0x10d/0x2b0
[ 600.307053] [<c134a4a0>] mutex_lock+0x10/0x20
[ 600.307064] [<c120c484>] acpi_ec_transaction+0x73/0x1e7
[ 600.307076] [<c11b7d1a>] ? cfq_set_request+0x1da/0x4a0
[ 600.307089] [<c10cf2e3>] ? mempool_alloc_slab+0x13/0x20
[ 600.307099] [<c120c695>] acpi_ec_read+0x43/0x50
[ 600.307110] [<c120c809>] acpi_ec_space_handler+0x83/0xe4
[ 600.307125] [<c1214a13>] acpi_ev_address_space_dispatch+0x16c/0x1b9
[ 600.307158] [<e0843447>] ? ata_sff_pause+0x17/0x20 [libata]
[ 600.307185] [<e0843470>] ? ata_sff_exec_command+0x20/0x30 [libata]
[ 600.307212] [<e0841e72>] ? ata_bmdma_setup+0x62/0x70 [libata]
[ 600.307223] [<c120c786>] ? acpi_ec_burst_disable+0x3d/0x3d
[ 600.307235] [<c121940f>] acpi_ex_access_region+0x20b/0x217
[ 600.307246] [<c10318eb>] ? cpuacct_charge+0x5b/0x70
[ 600.307257] [<c12197fd>] acpi_ex_field_datum_io+0x112/0x1b8
[ 600.307269] [<c1104b41>] ? kmem_cache_alloc+0x121/0x140
[ 600.307281] [<c1219977>] acpi_ex_extract_from_field+0xd4/0x222
[ 600.307295] [<c12290ee>] ? acpi_ut_allocate_object_desc_dbg+0x3b/0x70
[ 600.307308] [<c122918c>] ? acpi_ut_create_internal_object_dbg+0x18/0x70
[ 600.307320] [<c122933d>] ? acpi_ut_create_integer_object+0x2a/0x39
[ 600.307332] [<c12180b6>] acpi_ex_read_data_from_field+0x11a/0x141
[ 600.307345] [<c121d0e7>] acpi_ex_resolve_node_to_value+0x193/0x220
[ 600.307357] [<c1212d05>] ? acpi_ds_create_operand+0x118/0x1e9
[ 600.307368] [<c1218a00>] acpi_ex_resolve_to_value+0x1f0/0x1fc
[ 600.307381] [<c1212f00>] acpi_ds_evaluate_name_path+0x73/0xdf
[ 600.307393] [<c12119a4>] acpi_ds_exec_end_op+0x8c/0x3a4
[ 600.307404] [<c1223c53>] acpi_ps_parse_loop+0x718/0x86d
[ 600.307416] [<c1229474>] ? acpi_ut_create_generic_state+0x32/0x4c
[ 600.307428] [<c122318e>] acpi_ps_parse_aml+0x87/0x241
[ 600.307439] [<c12243f7>] acpi_ps_execute_method+0x1a3/0x238
[ 600.307452] [<c121fccf>] acpi_ns_evaluate+0xcb/0x18d
[ 600.307463] [<c121f37d>] ? acpi_evaluate_object+0x45/0x20f
[ 600.307475] [<c121f458>] acpi_evaluate_object+0x120/0x20f
[ 600.307488] [<c10f2c7c>] ? page_add_new_anon_rmap+0x8c/0xa0
[ 600.307508] [<c120822a>] acpi_evaluate_integer+0x36/0x5a
[ 600.307523] [<e0d7d228>] acpi_button_state_seq_show+0x26/0x5e [button]
[ 600.307537] [<c11317d5>] seq_read+0xf5/0x380
[ 600.307548] [<c11316e0>] ? seq_lseek+0x170/0x170
[ 600.307560] [<c115c693>] proc_reg_read+0x63/0x90
[ 600.307571] [<c1114b38>] vfs_read+0x88/0x160
[ 600.307582] [<c115c630>] ? proc_reg_write+0x90/0x90
[ 600.307592] [<c1114c4d>] sys_read+0x3d/0x70
[ 600.307604] [<c134c11f>] sysenter_do_call+0x12/0x28
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