[Bug 95316] [Broadwell] Random crashes when starting KDE with DP-MST dual monitor

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95316

--- Comment #2 from darkbasic <darkbasic at linuxsystems.it> ---
starting sddm is enough to trigger it.

[    9.628284] ------------[ cut here ]------------
[    9.628290] WARNING: CPU: 0 PID: 275 at kernel/workqueue.c:2421
check_flush_dependency+0x11b/0x130()
[    9.628299] workqueue: WQ_MEM_RECLAIM hci0:hci_power_off [bluetooth] is
flushing !WQ_MEM_RECLAIM events:btusb_work [btusb]
[    9.628300] Modules linked in:
[    9.628301]  bnep cdc_ether usbnet r8152 mii visor snd_hda_codec_hdmi
uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core
videodev media btusb btrtl btbcm btintel bluetooth crc16 joydev mousedev arc4
snd_soc_sst_broadwell hid_multitouch iTCO_wdt iTCO_vendor_support nvram msr
iwlmvm dell_wmi snd_soc_sst_haswell_pcm snd_soc_sst_ipc mac80211
snd_soc_sst_dsp iwlwifi cfg80211 dell_laptop rtsx_pci_ms snd_soc_ssm4567
memstick rfkill snd_soc_rt286 elan_i2c snd_soc_rl6347a dcdbas snd_soc_core
snd_compress i2c_hid snd_pcm_dmaengine ac97_bus intel_rapl x86_pkg_temp_thermal
nls_iso8859_1 intel_powerclamp nls_cp437 coretemp kvm_intel vfat kvm fat
irqbypass evdev input_leds mac_hid psmouse pcspkr serio_raw i2c_i801
intel_pch_thermal fan thermal lpc_ich shpchp i915 wmi drm_kms_helper
int3403_thermal
[    9.628333]  snd_soc_sst_acpi i2c_designware_platform video gpio_lynxpoint
snd_soc_sst_match 8250_dw i2c_designware_core drm int3402_thermal
spi_pxa2xx_platform snd_hda_intel tpm_crb snd_hda_codec battery intel_hid
snd_hda_core sparse_keymap fjes snd_hwdep int3400_thermal acpi_thermal_rel
intel_gtt acpi_als snd_pcm kfifo_buf industrialio acpi_pad snd_timer
syscopyarea sysfillrect sysimgblt fb_sys_fops tpm_tis i2c_algo_bit tpm ac
mei_me snd processor_thermal_device mei processor button int340x_thermal_zone
intel_soc_dts_iosf soundcore sch_fq_codel ip_tables x_tables btrfs xor raid6_pq
jitterentropy_rng sha256_ssse3 sha256_generic hmac drbg ansi_cprng
algif_skcipher af_alg uas usb_storage dm_crypt dm_mod sd_mod rtsx_pci_sdmmc
atkbd libps2 crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel
[    9.628360]  aesni_intel ahci aes_x86_64 lrw gf128mul glue_helper
ablk_helper cryptd libahci libata scsi_mod xhci_pci rtsx_pci xhci_hcd i8042
serio sdhci_acpi sdhci led_class mmc_core pl2303 mos7720 usbserial parport
hid_generic usbhid hid usbcore usb_common
[    9.628371] CPU: 0 PID: 275 Comm: kworker/u9:0 Not tainted 4.5.2-1-ARCH #1
[    9.628372] Hardware name: Dell Inc. XPS 13 9343/0F5KF3, BIOS A07 11/11/2015
[    9.628376] Workqueue: hci0 hci_power_off [bluetooth]
[    9.628377]  0000000000000086 000000003bd76755 ffff880212a0fb98
ffffffff812dad91
[    9.628379]  ffff880212a0fbe0 ffffffff81729a60 ffff880212a0fbd0
ffffffff81078e52
[    9.628380]  ffff880215887c00 ffff8800378fc740 ffffffffa0987950
ffff88021e494f40
[    9.628382] Call Trace:
[    9.628385]  [<ffffffff812dad91>] dump_stack+0x63/0x82
[    9.628389]  [<ffffffff81078e52>] warn_slowpath_common+0x82/0xc0
[    9.628391]  [<ffffffffa0987950>] ? btusb_waker+0x30/0x30 [btusb]
[    9.628392]  [<ffffffff81078eec>] warn_slowpath_fmt+0x5c/0x80
[    9.628396]  [<ffffffffa0baedb0>] ? hci_dev_do_close+0x500/0x500 [bluetooth]
[    9.628397]  [<ffffffff8108dd0b>] check_flush_dependency+0x11b/0x130
[    9.628399]  [<ffffffffa0987950>] ? btusb_waker+0x30/0x30 [btusb]
[    9.628400]  [<ffffffff81090129>] flush_work+0x79/0x1b0
[    9.628402]  [<ffffffff811cdb25>] ? __kmalloc_node_track_caller+0x35/0x320
[    9.628404]  [<ffffffff810900e2>] ? flush_work+0x32/0x1b0
[    9.628407]  [<ffffffff81495ed7>] ? __alloc_skb+0x87/0x1f0
[    9.628409]  [<ffffffff81090bb5>] __cancel_work_timer+0xa5/0x1d0
[    9.628412]  [<ffffffffa0baeb1e>] ? hci_dev_do_close+0x26e/0x500 [bluetooth]
[    9.628413]  [<ffffffff81090cf0>] cancel_work_sync+0x10/0x20
[    9.628415]  [<ffffffffa098784b>] btusb_close+0x2b/0x100 [btusb]
[    9.628418]  [<ffffffffa0baeb44>] hci_dev_do_close+0x294/0x500 [bluetooth]
[    9.628421]  [<ffffffffa0baedd2>] hci_power_off+0x22/0x50 [bluetooth]
[    9.628423]  [<ffffffff81090e6e>] process_one_work+0x14e/0x480
[    9.628424]  [<ffffffff810911e8>] worker_thread+0x48/0x4e0
[    9.628426]  [<ffffffff810911a0>] ? process_one_work+0x480/0x480
[    9.628428]  [<ffffffff81096d38>] kthread+0xd8/0xf0
[    9.628429]  [<ffffffff81096c60>] ? kthread_worker_fn+0x180/0x180
[    9.628431]  [<ffffffff815b0ebf>] ret_from_fork+0x3f/0x70
[    9.628432]  [<ffffffff81096c60>] ? kthread_worker_fn+0x180/0x180
[    9.628434] ---[ end trace 846a8b2b72ed9a34 ]---

-- 
You are receiving this mail because:
You are the assignee for the bug.
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20160508/280ff2f3/attachment.html>