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[Bug 1037465] New: i915: Unclaimed register detected before writing to register
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Wed, 03 May 2017 17:19:23 +0000
  • Message-id: <>

Bug ID: 1037465
Summary: i915: Unclaimed register detected before writing to
Classification: openSUSE
Product: openSUSE Distribution
Version: Leap 42.2
Hardware: Other
OS: Other
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Kernel
Assignee: kernel-maintainers@xxxxxxxxxxxxxxxxxxxxxx
Reporter: aspiers@xxxxxxxx
QA Contact: qa-bugs@xxxxxxx
Found By: ---
Blocker: ---

I get the following kernel warning every time I launch Google Chrome 58 after a
fresh boot:

2017-05-03T13:07:36.237280-04:00 arabian kernel: [ 90.410094] ------------[
cut here ]------------
2017-05-03T13:07:36.237291-04:00 arabian kernel: [ 90.410118] WARNING: CPU: 3
PID: 2245 at ../drivers/gpu/drm/i915/intel_uncore.c:633
hsw_unclaimed_reg_debug.isra.13+0x6b/0x90 [i915]()
2017-05-03T13:07:36.237292-04:00 arabian kernel: [ 90.410121] Unclaimed
register detected before writing to register 0x44404
2017-05-03T13:07:36.237300-04:00 arabian kernel: [ 90.410122] Modules linked
in: ctr ccm cmac ecb rfcomm fuse af_packet nf_log_ipv6 xt_pkttype nf_log_ipv4
nf_log_common xt_LOG xt_limit vboxpci(O) vboxnetadp(O) vboxnetflt(O)
ip6t_REJECT nf_reject_ipv6 xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6
ip6table_raw ipt_REJECT nf_reject_ipv4 iptable_raw xt_CT iptable_filter
ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast
nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack
ip6table_filter ip6_tables x_tables vboxdrv(O) bnep xfs libcrc32c
snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic arc4 ext4 jbd2
mbcache uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2
videobuf2_core v4l2_common videodev iTCO_wdt iTCO_vendor_support dell_laptop
btusb btrtl btbcm btintel bluetooth dcdbas dell_wmi ppdev crc16 sparse_keymap
iwlmvm mac80211 snd_soc_rt5640 snd_soc_rl6231 snd_soc_core snd_compress
dell_smm_hwmon intel_rapl x86_pkg_temp_thermal snd_hda_intel intel_powerclamp
coretemp snd_hda_codec snd_hda_core snd_hwdep snd_pcm iwlwifi kvm_intel
snd_timer kvm cfg80211 e1000e irqbypass mei_me lpc_ich pcspkr joydev i2c_i801
mfd_core shpchp ptp mei pps_core fan thermal snd battery dell_smo8800 elan_i2c
parport_pc parport 8250_dw int3403_thermal snd_soc_sst_acpi snd_soc_sst_match
soundcore regmap_i2c fjes gpio_lynxpoint processor_thermal_device
intel_soc_dts_iosf acpi_als i2c_designware_platform dell_rbtn kfifo_buf
int3400_thermal int3402_thermal i2c_designware_core acpi_pad ac
int340x_thermal_zone acpi_thermal_rel processor industrialio rfkill btrfs xor
raid6_pq dm_crypt sd_mod hid_generic usbhid crct10dif_pclmul crc32_pclmul
crc32c_intel ghash_clmulni_intel jitterentropy_rng drbg ansi_cprng aesni_intel
ahci libahci aes_x86_64 glue_helper lrw gf128mul ablk_helper cryptd nouveau
mxm_wmi ttm ehci_pci serio_raw ehci_hcd i915 i2c_algo_bit xhci_pci xhci_hcd
drm_kms_helper libata usbcore syscopyarea usb_common sysfillrect sysimgblt
fb_sys_fops drm sdhci_pci video wmi i2c_hid sdhci_acpi sdhci mmc_core button
dm_mirror dm_region_hash dm_log dm_mod sg scsi_mod autofs4
2017-05-03T13:07:36.237302-04:00 arabian kernel: [ 90.410222] CPU: 3 PID:
2245 Comm: X Tainted: G O 4.4.62-18.6-default #1
2017-05-03T13:07:36.237303-04:00 arabian kernel: [ 90.410223] Hardware name:
Dell Inc. Latitude E7450/0YGN55, BIOS A09 11/18/2015
2017-05-03T13:07:36.237304-04:00 arabian kernel: [ 90.410224]
0000000000000000 ffffffff81328a87 ffff88041cd93bf8 ffffffffa0434790
2017-05-03T13:07:36.237305-04:00 arabian kernel: [ 90.410228]
ffffffff8107e8c1 ffff880419030078 ffff88041cd93c48 0000000000044404
2017-05-03T13:07:36.237306-04:00 arabian kernel: [ 90.410230]
ffff880419030078 ffff880419030080 ffffffff8107e93c ffffffffa04347f0
2017-05-03T13:07:36.237307-04:00 arabian kernel: [ 90.410232] Call Trace:
2017-05-03T13:07:36.237307-04:00 arabian kernel: [ 90.410240]
[<ffffffff81019ea9>] dump_trace+0x59/0x320
2017-05-03T13:07:36.237308-04:00 arabian kernel: [ 90.410244]
[<ffffffff8101a26a>] show_stack_log_lvl+0xfa/0x180
2017-05-03T13:07:36.237309-04:00 arabian kernel: [ 90.410246]
[<ffffffff8101b011>] show_stack+0x21/0x40
2017-05-03T13:07:36.237310-04:00 arabian kernel: [ 90.410250]
[<ffffffff81328a87>] dump_stack+0x5c/0x85
2017-05-03T13:07:36.237310-04:00 arabian kernel: [ 90.410252]
[<ffffffff8107e8c1>] warn_slowpath_common+0x81/0xb0
2017-05-03T13:07:36.237311-04:00 arabian kernel: [ 90.410255]
[<ffffffff8107e93c>] warn_slowpath_fmt+0x4c/0x50
2017-05-03T13:07:36.237312-04:00 arabian kernel: [ 90.410270]
[<ffffffffa03b06eb>] hsw_unclaimed_reg_debug.isra.13+0x6b/0x90 [i915]
2017-05-03T13:07:36.237313-04:00 arabian kernel: [ 90.410286]
[<ffffffffa03b56bb>] gen8_write32+0x5b/0x1e0 [i915]
2017-05-03T13:07:36.237313-04:00 arabian kernel: [ 90.410297]
[<ffffffffa0360566>] gen8_enable_vblank+0x56/0x80 [i915]
2017-05-03T13:07:36.237314-04:00 arabian kernel: [ 90.410307]
[<ffffffffa011f1f2>] drm_vblank_enable+0x72/0xc0 [drm]
2017-05-03T13:07:36.237315-04:00 arabian kernel: [ 90.410316]
[<ffffffffa011f2ce>] drm_vblank_get+0x8e/0xc0 [drm]
2017-05-03T13:07:36.237315-04:00 arabian kernel: [ 90.410324]
[<ffffffffa011fe69>] drm_wait_vblank+0x79/0x5a0 [drm]
2017-05-03T13:07:36.237317-04:00 arabian kernel: [ 90.410332]
[<ffffffffa011d843>] drm_ioctl+0x223/0x460 [drm]
2017-05-03T13:07:36.237318-04:00 arabian kernel: [ 90.410336]
[<ffffffff81218a5c>] do_vfs_ioctl+0x30c/0x570
2017-05-03T13:07:36.237318-04:00 arabian kernel: [ 90.410343]
[<ffffffff81218d34>] SyS_ioctl+0x74/0x80
2017-05-03T13:07:36.237319-04:00 arabian kernel: [ 90.410347]
[<ffffffff8160e072>] entry_SYSCALL_64_fastpath+0x16/0x71
2017-05-03T13:07:36.237320-04:00 arabian kernel: [ 90.411666] DWARF2 unwinder
stuck at entry_SYSCALL_64_fastpath+0x16/0x71
2017-05-03T13:07:36.237321-04:00 arabian kernel: [ 90.411667]
2017-05-03T13:07:36.237321-04:00 arabian kernel: [ 90.411667] Leftover
inexact backtrace:
2017-05-03T13:07:36.237322-04:00 arabian kernel: [ 90.411667]
2017-05-03T13:07:36.237324-04:00 arabian kernel: [ 90.411671] ---[ end trace
b6697b0fbc6fcf72 ]---

Since about a week or so ago, I am getting regular total system freezes
(several times a day), where the desktop suddenly spontaneously locks up, and I
suspect it might be related to this i915 issue. The closest upstream bug I
could find is but I don't
know enough to be sure that it's the same thing.

Kernel is: 4.4.62-18.6-default #1 SMP Fri Apr 21 16:14:48 UTC 2017 (84f9824)
x86_64 x86_64 x86_64 GNU/Linux

Happy to provide more debug if it helps.

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