Comment # 7
on bug 91960
from Renan Birck
Ubuntu 16.04 mainline kernel, ASUS Z450LA laptop, has a similar error: Ago 23 11:33:48 alpha kernel: ------------[ cut here ]------------ Ago 23 11:33:48 alpha kernel: WARNING: CPU: 2 PID: 3045 at /mnt/disk2/xenial/drivers/gpu/drm/i915/intel_uncore.c:619 hsw_unclaimed_reg_debug+0x69/0x90 [i915]() Ago 23 11:33:48 alpha kernel: Unclaimed register detected before reading register 0x22384 Ago 23 11:33:48 alpha kernel: Modules linked in: rfcomm msr pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) bnep binfmt_misc nls_iso8859_1 uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_core v4l2_common videodev media btusb btrtl btbcm btintel intel_rapl bluetooth x86_pkg_temp_thermal arc4 intel_powerclamp coretemp snd_hda_codec_hdmi kvm_intel kvm rtl8723be(OE) btcoexist(OE) irqbypass rtl_pci(OE) snd_hda_codec_realtek crct10dif_pclmul rtlwifi(OE) crc32_pclmul mac80211 snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core asus_nb_wmi asus_wmi snd_hwdep snd_pcm sparse_keymap aesni_intel cfg80211 snd_seq_midi snd_seq_midi_event aes_x86_64 lrw snd_rawmidi rtsx_pci_ms snd_seq gf128mul glue_helper memstick ablk_helper cryptd snd_seq_device input_leds joydev serio_raw snd_timer Ago 23 11:33:48 alpha kernel: dw_dmac snd dw_dmac_core soundcore mac_hid mei_me int3402_thermal shpchp 8250_dw snd_soc_sst_acpi mei int3400_thermal processor_thermal_device spi_pxa2xx_platform acpi_thermal_rel int340x_thermal_zone intel_soc_dts_iosf intel_pch_thermal lpc_ich i2c_designware_platform tpm_crb i2c_designware_core acpi_pad parport_pc ppdev lp parport autofs4 hid_generic usbhid hid uas usb_storage rtsx_pci_sdmmc i915 psmouse i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt r8169 ahci fb_sys_fops mii libahci drm rtsx_pci wmi sdhci_acpi video sdhci fjes Ago 23 11:33:48 alpha kernel: CPU: 2 PID: 3045 Comm: Xorg Tainted: G OE 4.4.0-34-generic #53 Ago 23 11:33:48 alpha kernel: Hardware name: ASUSTeK COMPUTER INC. Z450LA/Z450LA, BIOS Z450LA.204 08/12/2015 Ago 23 11:33:48 alpha kernel: 0000000000000086 00000000f47942d3 ffff88024ed03cd8 ffffffff813f11b3 Ago 23 11:33:48 alpha kernel: ffff88024ed03d20 ffffffffc025fde0 ffff88024ed03d10 ffffffff81081102 Ago 23 11:33:48 alpha kernel: ffff880035ac0000 0000000000022384 ffff880035ac4568 0000000000022384 Ago 23 11:33:48 alpha kernel: Call Trace: Ago 23 11:33:48 alpha kernel: <IRQ> [<ffffffff813f11b3>] dump_stack+0x63/0x90 Ago 23 11:33:48 alpha kernel: [<ffffffff81081102>] warn_slowpath_common+0x82/0xc0 Ago 23 11:33:48 alpha kernel: [<ffffffff8108119c>] warn_slowpath_fmt+0x5c/0x80 Ago 23 11:33:48 alpha kernel: [<ffffffffc01d84b9>] hsw_unclaimed_reg_debug+0x69/0x90 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc01db0c9>] gen6_read32+0x59/0x1a0 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc01ce655>] intel_lrc_irq_handler+0xe5/0x240 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc018adc7>] gen8_gt_irq_handler+0x217/0x240 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc018ae91>] gen8_irq_handler+0xa1/0x740 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffff810dab8d>] handle_irq_event_percpu+0x8d/0x1d0 Ago 23 11:33:48 alpha kernel: [<ffffffff810dad0e>] handle_irq_event+0x3e/0x60 Ago 23 11:33:48 alpha kernel: [<ffffffff810de24d>] handle_edge_irq+0x7d/0x150 Ago 23 11:33:48 alpha kernel: [<ffffffff810310fa>] handle_irq+0x1a/0x30 Ago 23 11:33:48 alpha kernel: [<ffffffff8183095b>] do_IRQ+0x4b/0xd0 Ago 23 11:33:48 alpha kernel: [<ffffffff8182ea42>] common_interrupt+0x82/0x82 Ago 23 11:33:48 alpha kernel: <EOI> [<ffffffffc01cf094>] ? gen8_emit_request+0x224/0x320 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc01bc667>] __i915_add_request+0x147/0x210 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc01b0c36>] i915_gem_execbuffer_retire_commands+0x26/0x30 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc01cf7fb>] intel_execlists_submission+0x2eb/0x410 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc01b05c0>] i915_gem_do_execbuffer.isra.25+0xfa0/0x12a0 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc01b1542>] i915_gem_execbuffer2+0xb2/0x240 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc01be0e2>] ? i915_gem_busy_ioctl+0x92/0xe0 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffffc005a742>] drm_ioctl+0x152/0x540 [drm] Ago 23 11:33:48 alpha kernel: [<ffffffffc01b1490>] ? i915_gem_execbuffer+0x310/0x310 [i915] Ago 23 11:33:48 alpha kernel: [<ffffffff81220c3f>] do_vfs_ioctl+0x29f/0x490 Ago 23 11:33:48 alpha kernel: [<ffffffff81220ea9>] SyS_ioctl+0x79/0x90 Ago 23 11:33:48 alpha kernel: [<ffffffff8182df72>] entry_SYSCALL_64_fastpath+0x16/0x71 Ago 23 11:33:48 alpha kernel: ---[ end trace 62f496b552421664 ]--- PID 3045 is Xorg in this case.
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