On Sun, Feb 14, 2016 at 6:59 PM, Andy Lutomirski <luto@xxxxxxxxxx> 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.
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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