[Bug 91960] [i915] kernel warning hsw_unclaimed_reg_debug intel_uncore.c:619

Fri Oct 2 04:54:38 PDT 2015

https://bugs.freedesktop.org/show_bug.cgi?id=91960

--- Comment #2 from Denis Ryzhkov <denisr at denisr.com> ---
One more trace:

Oct  2 12:58:27 nb kernel: [    0.000000] Linux version 3.19.0-30-generic
(buildd at lgw01-13) (gcc version 4.9.2 (Ubuntu 4.9.2-10ubuntu13) ) #33-Ubuntu SMP
Mon Sep 21 20:58:04 UTC 2015 (Ubuntu 3.19.0-30.33-generic 3.19.8-ckt6)
Oct  2 12:58:27 nb kernel: [    0.000000] Command line:
BOOT_IMAGE=/boot/vmlinuz-3.19.0-30-generic.efi.signed root=... ro quiet splash
i915.mmio_debug=1 vt.handoff=7
Oct  2 12:58:27 nb kernel: [    0.000000] DMI: ASUSTeK COMPUTER INC.
TP300LDB/TP300LDB, BIOS TP300LDB.206 12/11/2014

Oct  2 13:02:02 nb kernel: [  217.737048] ------------[ cut here ]------------
Oct  2 13:02:02 nb kernel: [  217.737082] WARNING: CPU: 0 PID: 2113 at
/build/linux-aY9Y6L/linux-3.19.0/ubuntu/i915/intel_uncore.c:620
hsw_unclaimed_reg_debug+0x7d/0xa0 [i915
_bpo]()
Oct  2 13:02:02 nb kernel: [  217.737084] Unclaimed register detected before
writing to register 0x223a0
Oct  2 13:02:02 nb kernel: [  217.737086] Modules linked in: dm_crypt ctr ccm
bbswitch(OE) binfmt_misc rfcomm bnep nls_iso8859_1 uvcvideo videobuf2_vmalloc
videobuf2_memops v
ideobuf2_core v4l2_common videodev joydev btusb media hid_multitouch bluetooth
arc4 asus_nb_wmi asus_wmi mxm_wmi sparse_keymap intel_rapl iosf_mbi
snd_soc_rt5640 snd_soc_rl62
31 snd_soc_core snd_hda_codec_hdmi snd_compress x86_pkg_temp_thermal iwlmvm
snd_pcm_dmaengine intel_powerclamp coretemp mac80211 kvm_intel kvm
crct10dif_pclmul crc32_pclmul g
hash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper
cryptd iwlwifi snd_hda_codec_realtek snd_hda_codec_generic cfg80211 i915_bpo
serio_raw intel_ip
s lpc_ich shpchp mei_me drm_kms_helper mei snd_hda_intel snd_hda_controller drm
snd_hda_codec snd_hwdep i2c_algo_bit snd_pcm snd_seq_midi snd_seq_midi_event
snd_rawmidi snd_s
eq wmi snd_seq_device snd_timer dell_smo8800 video snd dw_dmac dw_dmac_core
soundcore i2c_hid snd_soc_sst_acpi 8250_dw i2c_designware_platform
spi_pxa2xx_platform i2c_designw
are_core acpi_pad mac_hid parport_pc ppdev lp parport autofs4 hid_generic
usbhid hid psmouse ahci libahci sdhci_acpi sdhci [last unloaded: nvidia]
Oct  2 13:02:02 nb kernel: [  217.737150] CPU: 0 PID: 2113 Comm: chrome
Tainted: P           OE  3.19.0-30-generic #33-Ubuntu
Oct  2 13:02:02 nb kernel: [  217.737152] Hardware name: ASUSTeK COMPUTER INC.
TP300LDB/TP300LDB, BIOS TP300LDB.206 12/11/2014
Oct  2 13:02:02 nb kernel: [  217.737154]  ffffffffc0481150 ffff88022ec03ca8
ffffffff817c4d4f 0000000000000007
Oct  2 13:02:02 nb kernel: [  217.737156]  ffff88022ec03cf8 ffff88022ec03ce8
ffffffff81076a8a ffff8801f388dc00
Oct  2 13:02:02 nb kernel: [  217.737159]  ffff880223070000 00000000000223a0
00000000000223a0 ffff880223070080
Oct  2 13:02:02 nb kernel: [  217.737162] Call Trace:
Oct  2 13:02:02 nb kernel: [  217.737163]  <IRQ>  [<ffffffff817c4d4f>]
dump_stack+0x45/0x57
Oct  2 13:02:02 nb kernel: [  217.737175]  [<ffffffff81076a8a>]
warn_slowpath_common+0x8a/0xc0
Oct  2 13:02:02 nb kernel: [  217.737177]  [<ffffffff81076b06>]
warn_slowpath_fmt+0x46/0x50
Oct  2 13:02:02 nb kernel: [  217.737184]  [<ffffffff813829c5>] ?
blk_run_queue+0x35/0x40
Oct  2 13:02:02 nb kernel: [  217.737205]  [<ffffffffc03ffc7d>]
hsw_unclaimed_reg_debug+0x7d/0xa0 [i915_bpo]
Oct  2 13:02:02 nb kernel: [  217.737223]  [<ffffffffc040489a>]
gen8_write32+0x5a/0x1b0 [i915_bpo]
Oct  2 13:02:02 nb kernel: [  217.737240]  [<ffffffffc03f6e8b>]
intel_lrc_irq_handler+0x19b/0x250 [i915_bpo]
Oct  2 13:02:02 nb kernel: [  217.737257]  [<ffffffffc03ede64>]
gen8_gt_irq_handler+0x274/0x2b0 [i915_bpo]
Oct  2 13:02:02 nb kernel: [  217.737271]  [<ffffffffc03edf22>]
gen8_irq_handler+0x82/0x5d0 [i915_bpo]
Oct  2 13:02:02 nb kernel: [  217.737276]  [<ffffffff815547ef>] ?
scsi_finish_command+0xcf/0x130
Oct  2 13:02:02 nb kernel: [  217.737280]  [<ffffffff814d749a>] ?
add_interrupt_randomness+0x3a/0x1f0
Oct  2 13:02:02 nb kernel: [  217.737284]  [<ffffffff810cea87>]
handle_irq_event_percpu+0x77/0x1a0
Oct  2 13:02:02 nb kernel: [  217.737287]  [<ffffffff810cebf1>]
handle_irq_event+0x41/0x70
Oct  2 13:02:02 nb kernel: [  217.737291]  [<ffffffff810d1c5e>]
handle_edge_irq+0x6e/0x120
Oct  2 13:02:02 nb kernel: [  217.737294]  [<ffffffff81017772>]
handle_irq+0x22/0x40
Oct  2 13:02:02 nb kernel: [  217.737297]  [<ffffffff817cee1f>]
do_IRQ+0x4f/0xf0
Oct  2 13:02:02 nb kernel: [  217.737300]  [<ffffffff817ccc2d>]
common_interrupt+0x6d/0x6d
Oct  2 13:02:02 nb kernel: [  217.737302]  <EOI> 
Oct  2 13:02:02 nb kernel: [  217.737304] ---[ end trace 6ed27c185e1a09a4 ]---

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