What does this backtrace mean?
Alex Villacís Lasso
a_villacis at palosanto.com
Tue Nov 29 00:59:37 UTC 2016
I have this computer (Acer Aspire One ZG5 using Fedora 25 32-bits) where
the backtrace shown below appears every single time the machine boots.
What does it mean? Should I be worried about it? Last seen on kernel
version 4.8.8.
[ 4.521679] checking generic (40000000 1e0000) vs hw (40000000 10000000)
[ 4.521682] fb: switching to inteldrmfb from VESA VGA
[ 4.521768] Console: switching to colour dummy device 80x25
[ 4.524130] [drm] Replacing VGA console driver
[ 4.524179] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 4.524182] [drm] Driver supports precise vblank timestamp query.
[ 4.529253] vgaarb: device changed decodes:
PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 4.851785] [drm] RC6 disabled, disabling runtime PM support
[ 4.851875] [drm] initialized overlay support
[ 4.857506] [drm] Initialized i915 1.6.0 20160711 for 0000:00:02.0 on
minor 0
[ 4.884684] ------------[ cut here ]------------
[ 4.884812] WARNING: CPU: 1 PID: 89 at
drivers/gpu/drm/i915/intel_fbdev.c:416
intel_fb_initial_config+0x366/0x680 [i915]
[ 4.884815] WARN_ON(!connector->state->crtc)
[ 4.884818] Modules linked in:
[ 4.884820] i915 serio_raw ata_generic r8169 i2c_algo_bit pata_acpi
drm_kms_helper mii drm fjes video
[ 4.884841] CPU: 1 PID: 89 Comm: kworker/u4:2 Not tainted
4.8.8-300.fc25.i686+PAE #1
[ 4.884843] Hardware name: Acer AOA150/ , BIOS v0.3301 05/09/2008
[ 4.884852] Workqueue: events_unbound async_run_entry_fn
[ 4.884856] d8e3a967 1973113d 00000286 f49b7d18 d875cb40 f49b7d5c
f8597748 f49b7d48
[ 4.884867] d846c0aa f85a3d93 f49b7d7c 00000059 f8597748 000001a0
f8542156 000001a0
[ 4.884877] 00000001 00000000 f683e000 f49b7d68 d846c116 00000009
00000000 f49b7d5c
[ 4.884887] Call Trace:
[ 4.884897] [<d875cb40>] dump_stack+0x58/0x78
[ 4.884903] [<d846c0aa>] __warn+0xea/0x110
[ 4.885012] [<f8542156>] ? intel_fb_initial_config+0x366/0x680 [i915]
[ 4.885017] [<d846c116>] warn_slowpath_fmt+0x46/0x60
[ 4.885056] [<f8542156>] intel_fb_initial_config+0x366/0x680 [i915]
[ 4.885056] [<f8541df0>] ? intelfb_create+0x540/0x540 [i915]
[ 4.885056] [<f84454d3>] drm_setup_crtcs+0x1c3/0xa40 [drm_kms_helper]
[ 4.885056] [<d849302f>] ? ttwu_do_activate+0x5f/0x70
[ 4.885056] [<d84939e4>] ? try_to_wake_up+0x44/0x340
[ 4.885056] [<d8b55407>] ? __mutex_unlock_slowpath+0x57/0x70
[ 4.885056] [<f844603c>] drm_fb_helper_initial_config+0xbc/0x410
[drm_kms_helper]
[ 4.885056] [<d84a79b2>] ? pick_next_task_fair+0x482/0x510
[ 4.885056] [<f8542ab6>] intel_fbdev_initial_config+0x16/0x30 [i915]
[ 4.885056] [<d848b6a5>] async_run_entry_fn+0x35/0x170
[ 4.885056] [<d84839ef>] process_one_work+0x13f/0x3a0
[ 4.885056] [<d8483c89>] worker_thread+0x39/0x460
[ 4.885056] [<d8483c50>] ? process_one_work+0x3a0/0x3a0
[ 4.885056] [<d8488f86>] kthread+0xa6/0xc0
[ 4.885056] [<d8b578a2>] ret_from_kernel_thread+0xe/0x24
[ 4.885056] [<d8488ee0>] ? kthread_worker_fn+0x140/0x140
[ 4.885498] ---[ end trace 8fd0e0d761bf7b53 ]---
[ 4.890944] fbcon: inteldrmfb (fb0) is primary device
[ 4.906700] ------------[ cut here ]------------
[ 4.906830] WARNING: CPU: 1 PID: 271 at
drivers/gpu/drm/i915/intel_fbdev.c:416
intel_fb_initial_config+0x366/0x680 [i915]
[ 4.906834] WARN_ON(!connector->state->crtc)
[ 4.906847] Modules linked in: i915 serio_raw ata_generic r8169
i2c_algo_bit pata_acpi drm_kms_helper mii drm fjes video
[ 4.906854] CPU: 1 PID: 271 Comm: kworker/1:3 Tainted: G
W 4.8.8-300.fc25.i686+PAE #1
[ 4.906856] Hardware name: Acer AOA150/ , BIOS v0.3301 05/09/2008
[ 4.906878] Workqueue: events output_poll_execute [drm_kms_helper]
[ 4.906888] d8e3a967 b579ca86 00000286 f6825d38 d875cb40 f6825d7c
f8597748 f6825d68
[ 4.906895] d846c0aa f85a3d93 f6825d9c 0000010f f8597748 000001a0
f8542156 000001a0
[ 4.906902] 00000001 00000000 f683e000 f6825d88 d846c116 00000009
00000000 f6825d7c
[ 4.906903] Call Trace:
[ 4.906915] [<d875cb40>] dump_stack+0x58/0x78
[ 4.906921] [<d846c0aa>] __warn+0xea/0x110
[ 4.907031] [<f8542156>] ? intel_fb_initial_config+0x366/0x680 [i915]
[ 4.907037] [<d846c116>] warn_slowpath_fmt+0x46/0x60
[ 4.907054] [<f8542156>] intel_fb_initial_config+0x366/0x680 [i915]
[ 4.907054] [<f8541df0>] ? intelfb_create+0x540/0x540 [i915]
[ 4.907054] [<f84454d3>] drm_setup_crtcs+0x1c3/0xa40 [drm_kms_helper]
[ 4.907054] [<d849302f>] ? ttwu_do_activate+0x5f/0x70
[ 4.907054] [<d84939e4>] ? try_to_wake_up+0x44/0x340
[ 4.907054] [<d8b54d34>] ? __ww_mutex_lock+0x14/0x90
[ 4.907054] [<f840bbcd>] ? drm_modeset_lock+0x8d/0xf0 [drm]
[ 4.907054] [<f840bcd4>] ? drm_modeset_lock_all_ctx+0xa4/0xb0 [drm]
[ 4.907054] [<f8445e6d>] drm_fb_helper_hotplug_event+0x11d/0x160
[drm_kms_helper]
[ 4.907054] [<f8542c11>] intel_fbdev_output_poll_changed+0x21/0x30
[i915]
[ 4.907054] [<f8437771>] drm_kms_helper_hotplug_event+0x21/0x30
[drm_kms_helper]
[ 4.907054] [<f8437968>] output_poll_execute+0x188/0x1c0
[drm_kms_helper]
[ 4.907054] [<d84839ef>] process_one_work+0x13f/0x3a0
[ 4.907054] [<d8483c89>] worker_thread+0x39/0x460
[ 4.907054] [<d8483c50>] ? process_one_work+0x3a0/0x3a0
[ 4.907054] [<d8488f86>] kthread+0xa6/0xc0
[ 4.907054] [<d8b578a2>] ret_from_kernel_thread+0xe/0x24
[ 4.907054] [<d8488ee0>] ? kthread_worker_fn+0x140/0x140
[ 4.907614] ---[ end trace 8fd0e0d761bf7b54 ]---
[ 4.908144] ------------[ cut here ]------------
[ 4.908171] WARNING: CPU: 1 PID: 271 at
drivers/gpu/drm/drm_atomic_helper.c:785
drm_atomic_helper_update_legacy_modeset_state+0x22a/0x260 [drm_kms_helper]
[ 4.908185] Modules linked in: i915 serio_raw ata_generic r8169
i2c_algo_bit pata_acpi drm_kms_helper mii drm fjes video
[ 4.908191] CPU: 1 PID: 271 Comm: kworker/1:3 Tainted: G
W 4.8.8-300.fc25.i686+PAE #1
[ 4.908193] Hardware name: Acer AOA150/ , BIOS v0.3301 05/09/2008
[ 4.908213] Workqueue: events output_poll_execute [drm_kms_helper]
[ 4.908222] d8e3a967 b579ca86 00000286 f6825cc0 d875cb40 00000000
f8449948 f6825cf0
[ 4.908229] d846c0aa d8d3fb6c 00000001 0000010f f8449948 00000311
f843e8ca 00000311
[ 4.908236] f683e000 00000000 f4891800 f6825d04 d846c1ba 00000009
00000000 00000000
[ 4.908237] Call Trace:
[ 4.908246] [<d875cb40>] dump_stack+0x58/0x78
[ 4.908251] [<d846c0aa>] __warn+0xea/0x110
[ 4.908272] [<f843e8ca>] ?
drm_atomic_helper_update_legacy_modeset_state+0x22a/0x260 [drm_kms_helper]
[ 4.908277] [<d846c1ba>] warn_slowpath_null+0x2a/0x30
[ 4.908297] [<f843e8ca>]
drm_atomic_helper_update_legacy_modeset_state+0x22a/0x260 [drm_kms_helper]
[ 4.908414] [<f85255e5>] ? intel_pre_plane_update+0x55/0x160 [i915]
[ 4.908522] [<f85264cd>] intel_atomic_commit_tail+0x92d/0xf40 [i915]
[ 4.908543] [<f8441674>] ?
drm_atomic_helper_setup_commit+0x2a4/0x300 [drm_kms_helper]
[ 4.908564] [<f843e41d>] ?
drm_atomic_helper_prepare_planes+0x3d/0xc0 [drm_kms_helper]
[ 4.908671] [<f8526ede>] intel_atomic_commit+0x3fe/0x500 [i915]
[ 4.908716] [<f840c81b>] ? drm_atomic_check_only+0x19b/0x660 [drm]
[ 4.908758] [<f840cd12>] drm_atomic_commit+0x32/0x60 [drm]
[ 4.908779] [<f8444243>] restore_fbdev_mode+0x153/0x2a0 [drm_kms_helper]
[ 4.908820] [<f840bcd4>] ? drm_modeset_lock_all_ctx+0xa4/0xb0 [drm]
[ 4.908841] [<f8445ed7>]
drm_fb_helper_restore_fbdev_mode_unlocked+0x27/0x70 [drm_kms_helper]
[ 4.908862] [<f8445f4d>] drm_fb_helper_set_par+0x2d/0x60
[drm_kms_helper]
[ 4.908883] [<f8445e7c>] drm_fb_helper_hotplug_event+0x12c/0x160
[drm_kms_helper]
[ 4.908991] [<f8542c11>] intel_fbdev_output_poll_changed+0x21/0x30
[i915]
[ 4.909010] [<f8437771>] drm_kms_helper_hotplug_event+0x21/0x30
[drm_kms_helper]
[ 4.909010] [<f8437968>] output_poll_execute+0x188/0x1c0
[drm_kms_helper]
[ 4.909010] [<d84839ef>] process_one_work+0x13f/0x3a0
[ 4.909010] [<d8483c89>] worker_thread+0x39/0x460
[ 4.909010] [<d8483c50>] ? process_one_work+0x3a0/0x3a0
[ 4.909010] [<d8488f86>] kthread+0xa6/0xc0
[ 4.909010] [<d8b578a2>] ret_from_kernel_thread+0xe/0x24
[ 4.909010] [<d8488ee0>] ? kthread_worker_fn+0x140/0x140
[ 4.909108] ---[ end trace 8fd0e0d761bf7b55 ]---
[ 5.512212] Console: switching to colour frame buffer device 128x37
[ 5.729784] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
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