[Intel-gfx] Possible 4.5 i915 Skylake regression
Daniel Vetter
daniel at ffwll.ch
Tue Feb 16 16:12:45 UTC 2016
On Mon, Feb 15, 2016 at 06:58:33AM -0800, Andy Lutomirski wrote:
> On Sun, Feb 14, 2016 at 6:59 PM, Andy Lutomirski <luto at kernel.org> wrote:
> > Hi-
> >
> > On 4.5-rc3 on a Dell XPS 13 9350 (Skylake i915, no nvidia on this
> > model), shortly after resume, I saw a single black flash on the
> > screen. The log said:
> >
> > [Feb13 07:05] [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR*
> > CPU pipe A FIFO underrun
> >
> > I haven't seen this on 4.4.
> >
> > I'd be happy to dig up debugging info, but I don't know what would be
> > useful. I have no i915 module options set.
>
> It's flashing quite frequently now, although I seem to get the
> underrun warning only once per resume.
We shut up the warning irq source to avoid hijacking an entire cpu core
;-)
There's a fix from Matt right after 4.5-rc4 in Linus' branch. I'm hoping
that should help.
-Daniel
>
> intel_reg_dumper says:
>
> DCC: 0x00000000 (g/dri/0/i915_forcewake_user)
> CHDECMISC: 0x00000000 (none, ch2 enh disabled,
> ch1 enh disabled, ch0 enh disabled, flex disabled, ep not present)
> C0DRB0: 0x00000000 (0x0000)
> C0DRB1: 0x00000000 (0x0000)
> C0DRB2: 0x00000000 (0x0000)
> C0DRB3: 0x00000000 (0x0000)
> C1DRB0: 0x00000000 (0x0000)
> C1DRB1: 0x00000000 (0x0000)
> C1DRB2: 0x00000000 (0x0000)
> C1DRB3: 0x00000000 (0x0000)
> C0DRA01: 0x00000000 (0x0000)
> C0DRA23: 0x00000000 (0x0000)
> C1DRA01: 0x00000000 (0x0000)
> C1DRA23: 0x00000000 (0x0000)
> PGETBL_CTL: 0x00000000
> VCLK_DIVISOR_VGA0: 0x00800000 (n = 0, m1 = 0, m2 = 0)
> VCLK_DIVISOR_VGA1: 0x00800000 (n = 0, m1 = 0, m2 = 0)
> VCLK_POST_DIV: 0x00800000 (vga0 p1 = 2, p2 = 2, vga1
> p1 = 2, p2 = 2)
> DPLL_TEST: 0x00000000 (, DPLLA input buffer
> disabled, DPLLB input buffer disabled)
> CACHE_MODE_0: 0x00000000
> D_STATE: 0x00000000
> DSPCLK_GATE_D: 0x00800000 (clock gates disabled: TVRUNIT)
> RENCLK_GATE_D1: 0x00800000
> RENCLK_GATE_D2: 0x00000000
> SDVOB: 0x00000000 (disabled, pipe A, stall
> disabled, not detected)
> SDVOC: 0x00000000 (disabled, pipe A, stall
> disabled, not detected)
> SDVOUDI: 0x00000000
> DSPARB: 0x00000000
> FW_BLC: 0x00000000
> FW_BLC2: 0x00000000
> FW_BLC_SELF: 0x00000000
> DSPFW1: 0x00000000
> DSPFW2: 0x00000000
> DSPFW3: 0x00000000
> ADPA: 0x00000000 (disabled, transcoder A,
> -hsync, -vsync)
> LVDS: 0x00000000 (disabled, pipe A, 18 bit, 1 channel)
> DVOA: 0x00000000 (disabled, pipe A, no
> stall, -hsync, -vsync)
> DVOB: 0x00000000 (disabled, pipe A, no
> stall, -hsync, -vsync)
> DVOC: 0x00000000 (disabled, pipe A, no
> stall, -hsync, -vsync)
> DVOA_SRCDIM: 0x00000000
> DVOB_SRCDIM: 0x00000000
> DVOC_SRCDIM: 0x00000000
> BLC_PWM_CTL: 0x00000000
> BLC_PWM_CTL2: 0x00000000
> PP_CONTROL: 0x00000000 (power target: off)
> PP_STATUS: 0x00000000 (off, not ready, sequencing idle)
> PP_ON_DELAYS: 0x00000000
> PP_OFF_DELAYS: 0x00000000
> PP_DIVISOR: 0x00000000
> PFIT_CONTROL: 0x00000000
> PFIT_PGM_RATIOS: 0x00000000
> PORT_HOTPLUG_EN: 0x00000000
> PORT_HOTPLUG_STAT: 0x00000000
> DSPACNTR: 0xc4802400 (enabled)
> DSPASTRIDE: 0x0000000f (15 bytes)
> DSPAPOS: 0x00000000 (0, 0)
> DSPASIZE: 0x0437077f (1920, 1080)
> DSPABASE: 0x00000000
> DSPASURF: 0x03300000
> DSPATILEOFF: 0x00000000
> PIPEACONF: 0x00000000 (disabled, inactive, pf-pd,
> rotate 0, 8bpc)
> PIPEASRC: 0x077f0437 (1920, 1080)
> PIPEASTAT: 0x00000000 (status:)
> PIPEA_GMCH_DATA_M: 0x00000000
> PIPEA_GMCH_DATA_N: 0x00000000
> PIPEA_DP_LINK_M: 0x00000000
> PIPEA_DP_LINK_N: 0x00000000
> CURSOR_A_BASE: 0x00000000
> CURSOR_A_CONTROL: 0x00000000
> CURSOR_A_POSITION: 0x00000000
> FPA0: 0x00800000 (n = 0, m1 = 0, m2 = 0)
> FPA1: 0x00800000 (n = 0, m1 = 0, m2 = 0)
> DPLL_A: 0x00800000 (disabled, non-dvo, VGA,
> default clock, unknown mode, p1 = 8, p2 = 0)
> DPLL_A_MD: 0x00000000
> HTOTAL_A: 0x00000000 (1 active, 1 total)
> HBLANK_A: 0x00000000 (1 start, 1 end)
> HSYNC_A: 0x00000000 (1 start, 1 end)
> VTOTAL_A: 0x00000000 (1 active, 1 total)
> VBLANK_A: 0x00000000 (1 start, 1 end)
> VSYNC_A: 0x00000000 (1 start, 1 end)
> BCLRPAT_A: 0x00000000
> VSYNCSHIFT_A: 0x00000000
> DSPBCNTR: 0x00000000 (disabled)
> DSPBSTRIDE: 0x00000000 (0 bytes)
> DSPBPOS: 0x00000000 (0, 0)
> DSPBSIZE: 0x00000000 (1, 1)
> DSPBBASE: 0x00000000
> DSPBSURF: 0x00000000
> DSPBTILEOFF: 0x00000000
> PIPEBCONF: 0x00000000 (disabled, inactive, pf-pd,
> rotate 0, 8bpc)
> PIPEBSRC: 0x00000000 (1, 1)
> PIPEBSTAT: 0x00000000 (status:)
> PIPEB_GMCH_DATA_M: 0x00000000
> PIPEB_GMCH_DATA_N: 0x00000000
> PIPEB_DP_LINK_M: 0x00000000
> PIPEB_DP_LINK_N: 0x00000000
> CURSOR_B_BASE: 0x00000000
> CURSOR_B_CONTROL: 0x00000000
> CURSOR_B_POSITION: 0x00000000
> FPB0: 0x00000000 (n = 0, m1 = 0, m2 = 0)
> FPB1: 0x00000000 (n = 0, m1 = 0, m2 = 0)
> DPLL_B: 0x00000000 (disabled, non-dvo, VGA,
> default clock, unknown mode, p1 = 0, p2 = 0)
> DPLL_B_MD: 0x00800000
> HTOTAL_B: 0x00000000 (1 active, 1 total)
> HBLANK_B: 0x00000000 (1 start, 1 end)
> HSYNC_B: 0x00000000 (1 start, 1 end)
> VTOTAL_B: 0x00000000 (1 active, 1 total)
> VBLANK_B: 0x00000000 (1 start, 1 end)
> VSYNC_B: 0x00000000 (1 start, 1 end)
> BCLRPAT_B: 0x00000000
> VSYNCSHIFT_B: 0x00000000
> VCLK_DIVISOR_VGA0: 0x00800000
> VCLK_DIVISOR_VGA1: 0x00800000
> VCLK_POST_DIV: 0x00800000
> VGACNTRL: 0x00000000 (enabled)
> TV_CTL: 0x00000000
> TV_DAC: 0x00000000
> TV_CSC_Y: 0x00000000
> TV_CSC_Y2: 0x00000000
> TV_CSC_U: 0x00000000
> TV_CSC_U2: 0x00000000
> TV_CSC_V: 0x00000000
> TV_CSC_V2: 0x00000000
> TV_CLR_KNOBS: 0x00000000
> TV_CLR_LEVEL: 0x00000000
> TV_H_CTL_1: 0x00000000
> TV_H_CTL_2: 0x00000000
> TV_H_CTL_3: 0x00000000
> TV_V_CTL_1: 0x00000000
> TV_V_CTL_2: 0x00000000
> TV_V_CTL_3: 0x00000000
> TV_V_CTL_4: 0x00000000
> TV_V_CTL_5: 0x00000000
> TV_V_CTL_6: 0x00000000
> TV_V_CTL_7: 0x00000000
> TV_SC_CTL_1: 0x00000000
> TV_SC_CTL_2: 0x00000000
> TV_SC_CTL_3: 0x00000000
> TV_WIN_POS: 0x00000000
> TV_WIN_SIZE: 0x00000000
> TV_FILTER_CTL_1: 0x00000000
> TV_FILTER_CTL_2: 0x00000000
> TV_FILTER_CTL_3: 0x00000000
> TV_CC_CONTROL: 0x00000000
> TV_CC_DATA: 0x00000000
> TV_H_LUMA_0: 0x00000000
> TV_H_LUMA_59: 0x00000000
> TV_H_CHROMA_0: 0x00000000
> TV_H_CHROMA_59: 0x00000000
> FBC_CFB_BASE: 0x00000000
> FBC_LL_BASE: 0x00000000
> FBC_CONTROL: 0x00000000
> FBC_COMMAND: 0x00000000
> FBC_STATUS: 0x00000000
> FBC_CONTROL2: 0x00000000
> FBC_FENCE_OFF: 0x00000000
> FBC_MOD_NUM: 0x00000000
> MI_MODE: 0x00000200
> MI_ARB_STATE: 0x00000000
> MI_RDRET_STATE: 0x00000000
> ECOSKPD: 0x00000000
> DP_B: 0x00000000
> DPB_AUX_CH_CTL: 0x00000000
> DPB_AUX_CH_DATA1: 0x00000000
> DPB_AUX_CH_DATA2: 0x00000000
> DPB_AUX_CH_DATA3: 0x00000000
> DPB_AUX_CH_DATA4: 0x00000000
> DPB_AUX_CH_DATA5: 0x00000000
> DP_C: 0x00000000
> DPC_AUX_CH_CTL: 0x00000000
> DPC_AUX_CH_DATA1: 0x00000000
> DPC_AUX_CH_DATA2: 0x00000000
> DPC_AUX_CH_DATA3: 0x00000000
> DPC_AUX_CH_DATA4: 0x00000000
> DPC_AUX_CH_DATA5: 0x00000000
> DP_D: 0x00000000
> DPD_AUX_CH_CTL: 0x00000000
> DPD_AUX_CH_DATA1: 0x00000000
> DPD_AUX_CH_DATA2: 0x00000000
> DPD_AUX_CH_DATA3: 0x00000000
> DPD_AUX_CH_DATA4: 0x00000000
> DPD_AUX_CH_DATA5: 0x00000000
> AUD_CONFIG: 0x00000000
> AUD_HDMIW_STATUS: 0x00000000
> AUD_CONV_CHCNT: 0x00000000
> VIDEO_DIP_CTL: 0x00000000
> AUD_PINW_CNTR: 0x00000000
> AUD_CNTL_ST: 0x00000000
> AUD_PIN_CAP: 0x00000000
> AUD_PINW_CAP: 0x00000000
> AUD_PINW_UNSOLRESP: 0x00000000
> AUD_OUT_DIG_CNVT: 0x00000000
> AUD_OUT_CWCAP: 0x00000000
> AUD_GRP_CAP: 0x00000000
> FENCE 0: 0x00000000 (enabled)
> FENCE 1: 0x00000000 (enabled)
> FENCE 2: 0x00000000 (enabled)
> FENCE 3: 0x00000000 (enabled)
> FENCE 4: 0x00000000 (enabled)
> FENCE 5: 0x00000000 (enabled)
> FENCE 6: 0x00000000 (enabled)
> FENCE 7: 0x00000000 (enabled)
> FENCE 8: 0x00000000 (enabled)
> FENCE 9: 0x00000000 (enabled)
> FENCE 10: 0x00000000 (enabled)
> FENCE 11: 0x00000000 (enabled)
> FENCE 12: 0x00000000 (enabled)
> FENCE 13: 0x00000000 (enabled)
> FENCE 14: 0x00000000 (enabled)
> FENCE 15: 0x00000000 (enabled)
> FENCE START 0: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 0: 0x00000000 (
> 0x00000000 end)
> FENCE START 1: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 1: 0x00000000 (
> 0x00000000 end)
> FENCE START 2: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 2: 0x00000000 (
> 0x00000000 end)
> FENCE START 3: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 3: 0x00000000 (
> 0x00000000 end)
> FENCE START 4: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 4: 0x00000000 (
> 0x00000000 end)
> FENCE START 5: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 5: 0x00000000 (
> 0x00000000 end)
> FENCE START 6: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 6: 0x00000000 (
> 0x00000000 end)
> FENCE START 7: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 7: 0x00000000 (
> 0x00000000 end)
> FENCE START 8: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 8: 0x00000000 (
> 0x00000000 end)
> FENCE START 9: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 9: 0x00000000 (
> 0x00000000 end)
> FENCE START 10: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 10: 0x00000000 (
> 0x00000000 end)
> FENCE START 11: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 11: 0x00000000 (
> 0x00000000 end)
> FENCE START 12: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 12: 0x00000000 (
> 0x00000000 end)
> FENCE START 13: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 13: 0x00000000 (
> 0x00000000 end)
> FENCE START 14: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 14: 0x00000000 (
> 0x00000000 end)
> FENCE START 15: 0x00000000 (disabled, X tile walk,
> 128 pitch, 0x00000000 start)
> FENCE END 15: 0x00000000 (
> 0x00000000 end)
> INST_PM: 0x00000000
> SDVO phase shift 0 out of range -- probobly not an issue.
> pipe A dot 7200 n 0 m1 0 m2 0 p1 8 p2 10
> p1 out of range
> SDVO phase shift 0 out of range -- probobly not an issue.
> pipe B dot 57600 n 0 m1 0 m2 0 p1 1 p2 10
> FENCE START 0: 0x065b5001
> FENCE END 0: 0x06816027
> FENCE START 1: 0x03b44001
> FENCE END 1: 0x0422e02b
> FENCE START 2: 0x08c40001
> FENCE END 2: 0x0977003b
> FENCE START 3: 0x00000000
> FENCE END 3: 0x00000000
> FENCE START 4: 0x0e750001
> FENCE END 4: 0x0ebd7027
> FENCE START 5: 0x00000000
> FENCE END 5: 0x00000000
> FENCE START 6: 0x0ee80003
> FENCE END 6: 0x0ef3d009
> FENCE START 7: 0x0ef41003
> FENCE END 7: 0x0ef41000
> FENCE START 8: 0x03300001
> FENCE END 8: 0x03ae803b
> FENCE START 9: 0x0ef42003
> FENCE END 9: 0x0ef42000
> FENCE START 10: 0x00000000
> FENCE END 10: 0x00000000
> FENCE START 11: 0x0cc38003
> FENCE END 11: 0x0cc40002
> FENCE START 12: 0x00000000
> FENCE END 12: 0x00000000
> FENCE START 13: 0x01d09003
> FENCE END 13: 0x01d09000
> FENCE START 14: 0x04cf2001
> FENCE END 14: 0x0546203b
> FENCE START 15: 0x0d4f5001
> FENCE END 15: 0x0deda01b
> FENCE START 16: 0x054dd003
> FENCE END 16: 0x05599006
> FENCE START 17: 0x0ef45003
> FENCE END 17: 0x0f04400f
> FENCE START 18: 0x042a7003
> FENCE END 18: 0x042af002
> FENCE START 19: 0x01d0e003
> FENCE END 19: 0x01d0e000
> FENCE START 20: 0x00000000
> FENCE END 20: 0x00000000
> FENCE START 20: 0x00000000
> FENCE END 20: 0x00000000
> FENCE START 21: 0x065b3003
> FENCE END 21: 0x065b3000
> FENCE START 22: 0x065b4003
> FENCE END 22: 0x065b4000
> FENCE START 23: 0x0689c003
> FENCE END 23: 0x0689c000
> FENCE START 24: 0x04bc5003
> FENCE END 24: 0x04cc400f
> FENCE START 25: 0x00000000
> FENCE END 25: 0x00000000
> FENCE START 26: 0x01d0f003
> FENCE END 26: 0x01d0f000
> FENCE START 27: 0x00000000
> FENCE END 27: 0x00000000
> FENCE START 28: 0x00000000
> FENCE END 28: 0x00000000
> FENCE START 29: 0x00000000
> FENCE END 29: 0x00000000
> FENCE START 30: 0x0081b001
> FENCE END 30: 0x011c503b
> FENCE START 31: 0x0aa77001
> FENCE END 31: 0x0b1e703b
> GEN6_RP_CONTROL: 0x00000d92 (enabled)
> GEN6_RPNSWREQ: 0x1c800000
> GEN6_RP_DOWN_TIMEOUT: 0x000b71b0
> GEN6_RP_INTERRUPT_LIMITS: 0x1e000000
> GEN6_RP_UP_THRESHOLD: 0x000018e7
> GEN6_RP_UP_EI: 0x00001d4c
> GEN6_RP_DOWN_EI: 0x00005dc0
> GEN6_RP_IDLE_HYSTERSIS: 0x0000000a
> GEN6_RC_STATE: 0x00000000
> GEN6_RC_CONTROL: 0x88040000
> GEN6_RC1_WAKE_RATE_LIMIT: 0x03e80000
> GEN6_RC6_WAKE_RATE_LIMIT: 0x006c0000
> GEN6_RC_EVALUATION_INTERVAL: 0x0001e848
> GEN6_RC_IDLE_HYSTERSIS: 0x00000019
> GEN6_RC_SLEEP: 0x00000000
> GEN6_RC1e_THRESHOLD: 0x00000000
> GEN6_RC6_THRESHOLD: 0x0000927c
> GEN6_RC_VIDEO_FREQ: 0x09000000
> GEN6_PMIER: 0x00000000
> GEN6_PMIMR: 0x00000000
> GEN6_PMINTRMSK: 0x00003f8e
>
> I also got a warning:
>
> [ 1754.735243] [drm:intel_cpu_fifo_underrun_irq_handler [i915]]
> *ERROR* CPU pipe A FIFO underrun
> [ 2008.331235] snd_hda_intel 0000:00:1f.3: azx_get_response timeout,
> switching to polling mode: last cmd=0x001f0500
> [ 2075.075871] ------------[ cut here ]------------
> [ 2075.075946] WARNING: CPU: 0 PID: 0 at
> drivers/gpu/drm/i915/intel_uncore.c:599
> hsw_unclaimed_reg_debug+0x69/0x90 [i915]()
> [ 2075.075953] Unclaimed register detected before writing to register 0x44324
> [ 2075.075957] Modules linked in: rfcomm fuse ccm cmac xt_CHECKSUM
> ipt_MASQUERADE nf_nat_masquerade_ipv4 tun nf_conntrack_netbios_ns
> nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6
> xt_conntrack ebtable_broute bridge stp llc ebtable_filter ebtable_nat
> ebtables ip6table_security ip6table_raw ip6table_nat nf_conntrack_ipv6
> nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_filter ip6_tables
> iptable_security iptable_raw iptable_nat nf_conntrack_ipv4
> nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle arc4
> bnep iwlmvm mac80211 snd_hda_codec_hdmi snd_hda_codec_realtek
> snd_hda_codec_generic snd_hda_intel snd_hda_codec hid_multitouch
> snd_hwdep intel_rapl snd_hda_core x86_pkg_temp_thermal iwlwifi
> coretemp kvm_intel snd_seq kvm uvcvideo snd_seq_device
> videobuf2_vmalloc snd_pcm videobuf2_memops
> [ 2075.076068] videobuf2_v4l2 videobuf2_core btusb cfg80211
> i2c_designware_platform i2c_designware_core btrtl wmi_mof videodev
> dell_wmi dell_laptop btbcm btintel snd_timer bluetooth dell_smbios
> vfat fat dcdbas irqbypass snd efi_pstore ghash_clmulni_intel
> rtsx_pci_ms memstick joydev media pcspkr efivars shpchp soundcore
> i2c_i801 mei_me rfkill mei processor_thermal_device idma64 virt_dma
> intel_soc_dts_iosf intel_lpss_pci wmi acpi_als pinctrl_sunrisepoint
> nfsd pinctrl_intel intel_lpss_acpi intel_lpss kfifo_buf
> int3403_thermal int340x_thermal_zone int3400_thermal intel_hid
> acpi_pad acpi_thermal_rel sparse_keymap industrialio tpm_tis tpm
> auth_rpcgss nfs_acl lockd binfmt_misc grace sunrpc dm_crypt i915
> i2c_algo_bit drm_kms_helper syscopyarea rtsx_pci_sdmmc sysfillrect
> mmc_core sysimgblt fb_sys_fops drm crct10dif_pclmul
> [ 2075.076192] crc32_pclmul crc32c_intel serio_raw rtsx_pci i2c_hid video
> [ 2075.076210] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.5.0-rc3-acpi+ #58
> [ 2075.076215] Hardware name: Dell Inc. XPS 13 9350/07TYC2, BIOS 1.1.9
> 12/18/2015
> [ 2075.076220] 0000000000000086 582d5957df170645 ffff880280c03c78
> ffffffff81449b73
> [ 2075.076230] ffff880280c03cc0 ffffffffa01ea510 ffff880280c03cb0
> ffffffff81094252
> [ 2075.076240] ffff88026eb00000 0000000000044324 ffff88026eb00000
> 00000000ffffff9f
> [ 2075.076250] Call Trace:
> [ 2075.076254] <IRQ> [<ffffffff81449b73>] dump_stack+0x65/0x92
> [ 2075.076276] [<ffffffff81094252>] warn_slowpath_common+0x82/0xc0
> [ 2075.076285] [<ffffffff810942ec>] warn_slowpath_fmt+0x5c/0x80
> [ 2075.076345] [<ffffffffa0161499>] hsw_unclaimed_reg_debug+0x69/0x90 [i915]
> [ 2075.076399] [<ffffffffa016474e>] gen9_write32+0x6e/0x390 [i915]
> [ 2075.076408] [<ffffffff8185705e>] ? _raw_spin_unlock+0xe/0x10
> [ 2075.076433] [<ffffffffa010df09>] snb_update_pm_irq+0x69/0xc0 [i915]
> [ 2075.076457] [<ffffffffa01123c9>] gen6_disable_pm_irq+0x19/0x40 [i915]
> [ 2075.076480] [<ffffffffa0112461>] gen6_rps_irq_handler+0x71/0xe0 [i915]
> [ 2075.076503] [<ffffffffa01131e3>] gen8_gt_irq_handler+0x183/0x250 [i915]
> [ 2075.076526] [<ffffffffa0113362>] gen8_irq_handler+0xb2/0x6e0 [i915]
> [ 2075.076533] [<ffffffff818571a0>] ? _raw_spin_unlock_irqrestore+0x20/0x40
> [ 2075.076539] [<ffffffff81857036>] ? _raw_write_unlock+0x16/0x30
> [ 2075.076547] [<ffffffff810ed861>] handle_irq_event_percpu+0x41/0x1c0
> [ 2075.076553] [<ffffffff810eda19>] handle_irq_event+0x39/0x60
> [ 2075.076563] [<ffffffff810f0ee0>] handle_edge_irq+0x90/0x150
> [ 2075.076578] [<ffffffff81007e3d>] handle_irq+0xad/0x180
> [ 2075.076584] [<ffffffff8185a0a7>] do_IRQ+0x57/0xf0
> [ 2075.076591] [<ffffffff8185820c>] common_interrupt+0x8c/0x8c
> [ 2075.076594] <EOI> [<ffffffff816ea3b3>] ? cpuidle_enter_state+0x143/0x2d0
> [ 2075.076610] [<ffffffff816ea38e>] ? cpuidle_enter_state+0x11e/0x2d0
> [ 2075.076618] [<ffffffff816ea577>] cpuidle_enter+0x17/0x20
> [ 2075.076624] [<ffffffff810d747a>] call_cpuidle+0x2a/0x40
> [ 2075.076628] [<ffffffff810d7863>] cpu_startup_entry+0x2a3/0x360
> [ 2075.076636] [<ffffffff8184b9c9>] rest_init+0x89/0x90
> [ 2075.076644] [<ffffffff81f7a00b>] start_kernel+0x49e/0x4bf
> [ 2075.076649] [<ffffffff81f79120>] ? early_idt_handler_array+0x120/0x120
> [ 2075.076655] [<ffffffff81f79323>] x86_64_start_reservations+0x38/0x3a
> [ 2075.076660] [<ffffffff81f7946f>] x86_64_start_kernel+0x14a/0x16d
> [ 2075.076665] ---[ end trace e32fa236041dc22e ]---
>
> --Andy
> _______________________________________________
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Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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