The system would frequently slow down (1-2 a day) slow down, hang, or throw me out back to the gdm login screen, respectively. dmesg gives: WARNING: CPU: 3 PID: 0 at /build/buildd/linux-3.19.0/drivers/gpu/drm/i915/intel_uncore.c:125 gen6_gt_check_fifodbg.isra.8+0x40/0x50 [i915]() [ 395.267274] GT wake FIFO error 0x3 [ 395.267275] Modules linked in: pci_stub vboxpci(OE) vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) arc4 md4 nls_utf8 cifs fscache cfg80211 rfcomm bnep joydev intel_rapl hid_logitech iosf_mbi x86_pkg_temp_thermal ff_memless hid_generic intel_powerclamp coretemp kvm_intel usbhid btusb gpio_ich hid bluetooth kvm crct10dif_pclmul snd_hda_codec_hdmi crc32_pclmul snd_hda_codec_realtek ghash_clmulni_intel snd_hda_codec_generic aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd serio_raw nuvoton_cir snd_hda_intel rc_core mac_hid 8250_fintek snd_hda_controller snd_hda_codec snd_hwdep snd_pcm i915 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq video drm_kms_helper snd_seq_device snd_timer mei_me drm snd lpc_ich mei shpchp i2c_algo_bit soundcore parport_pc ppdev lp parport autofs4 btrfs xor [ 395.267320] raid6_pq uas usb_storage e1000e psmouse ahci libahci ptp pps_core [ 395.267327] CPU: 3 PID: 0 Comm: swapper/3 Tainted: G W OE 3.19.0-16-generic #16-Ubuntu [ 395.267329] Hardware name: /DH67CL, BIOS BLH6710H.86A.0076.2010.1115.1959 11/15/2010 [ 395.267331] ffffffffc077cdb8 ffff88041fac3c98 ffffffff817c2235 0000000000000007 [ 395.267334] ffff88041fac3ce8 ffff88041fac3cd8 ffffffff8107595a 0000000000000f72 [ 395.267337] ffff88040c610060 0000000000000003 000000000001f001 000000000002203c [ 395.267340] Call Trace: [ 395.267341] <IRQ> [<ffffffff817c2235>] dump_stack+0x45/0x57 [ 395.267348] [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0 [ 395.267351] [<ffffffff810759d6>] warn_slowpath_fmt+0x46/0x50 [ 395.267368] [<ffffffffc0707b80>] gen6_gt_check_fifodbg.isra.8+0x40/0x50 [i915] [ 395.267389] [<ffffffffc0707bb8>] __gen6_gt_force_wake_put+0x28/0x30 [i915] [ 395.267397] [<ffffffffc070af52>] gen6_read32+0x132/0x140 [i915] [ 395.267405] [<ffffffffc06fa039>] i915_hangcheck_elapsed+0x319/0x440 [i915] [ 395.267406] [<ffffffff810dc290>] ? internal_add_timer+0x80/0x80 [ 395.267413] [<ffffffffc06f9d20>] ? i915_queue_hangcheck+0x60/0x60 [i915] [ 395.267415] [<ffffffff810dc2d9>] call_timer_fn+0x39/0x110 [ 395.267422] [<ffffffffc06f9d20>] ? i915_queue_hangcheck+0x60/0x60 [i915] [ 395.267423] [<ffffffff810de140>] run_timer_softirq+0x250/0x320 [ 395.267425] [<ffffffff81079d89>] __do_softirq+0x109/0x270 [ 395.267427] [<ffffffff8107a055>] irq_exit+0x95/0xa0 [ 395.267428] [<ffffffff817cc366>] smp_apic_timer_interrupt+0x46/0x60 [ 395.267429] [<ffffffff817ca3fd>] apic_timer_interrupt+0x6d/0x80 [ 395.267430] <EOI> [<ffffffff81664402>] ? cpuidle_enter_state+0x62/0x160 [ 395.267432] [<ffffffff816643f1>] ? cpuidle_enter_state+0x51/0x160 [ 395.267434] [<ffffffff816645e7>] cpuidle_enter+0x17/0x20 [ 395.267436] [<ffffffff810b6a41>] cpu_startup_entry+0x311/0x3b0 [ 395.267437] [<ffffffff81048f97>] start_secondary+0x197/0x1c0 [ 395.267438] ---[ end trace 68e780780d50c524 ]--- [ 395.267444] [drm] stuck on render ring [ 395.267449] [drm] stuck on blitter ring [ 395.268190] [drm] GPU HANG: ecode 6:0:0xf4e9fffe, in Xorg [1327], reason: Ring hung, action: reset [ 395.268191] [drm] GPU hangs can indicate a bug anywhere in the entire gfx stack, including userspace. [ 395.268192] [drm] Please file a _new_ bug report on bugs.freedesktop.org against DRI -> DRM/Intel [ 395.268192] [drm] drm/i915 developers can then reassign to the right component if it's not a kernel issue. [ 395.268193] [drm] The gpu crash dump is required to analyze gpu hangs, so please always attach it. [ 395.268194] [drm] GPU crash dump saved to /sys/class/drm/card0/error [ 395.268311] [drm:i915_set_reset_status [i915]] *ERROR* gpu hanging too fast, banning! [ 395.276285] drm/i915: Resetting chip after gpu hang Please find attached /sys/class/drm/card0/error.
Attachment is missing. While at it, add drm.debug=0xe to your kernel command line, reproduce the bug again and attach full dmesg.
Created attachment 115975 [details] Output from "dmesg" (drm.debug=0xe) The error had been reproduced using "drm.debug=0x3" added to the kernel command line.
You are using the kernel shipped with Ubuntu, which may contain a number of patches the upstream developers aren't aware of. Could you verify the issue occurs with an upstream kernel? Ideally, use the brach drm-intel-nightly from http://cgit.freedesktop.org/drm-intel for the latest i915 code.
Timeout, closing. Please reopen if you can reproduce the issue with a recent upstream kernel.
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