Comment 41 for bug 1402331

On 18 Feb, 2015 I installed kernel 3.19.0-031900-generic #201502091451 SMP Mon Feb 9 14:52:52 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux to see if the above bug had been fixed. This morning at 07:18:55, 19 Feb 2015 the system froze while clicking on a link to open in Firefox. The above 'Hangcheck' error did not appear in my syslog, below is what I see during that time period. Note: I was able to CTRL>ALT>F1 into a terminal and logged in. Attempted to run 'startx' however it did not run (possibly I did it wrong) but I will attach the Xorg.1.log from this as well as dmesg from the boot. The below are the lines from my syslog when this lockup happened:

Feb 19 07:18:54 localhost kernel: [49604.616334] [drm:i915_gem_open]
Feb 19 07:19:59 localhost kernel: [49669.989779] [drm:intel_crtc_cursor_set_obj] cursor off
Feb 19 07:19:59 localhost kernel: [49669.989786] [drm:g4x_check_srwm] SR watermark: display plane 92, cursor 2
Feb 19 07:19:59 localhost kernel: [49669.989789] [drm:g4x_check_srwm] display watermark is too large(92/63), disabling
Feb 19 07:19:59 localhost kernel: [49669.989791] [drm:intel_set_memory_cxsr] memory self-refresh is disabled
Feb 19 07:19:59 localhost kernel: [49669.989794] [drm:g4x_update_wm] Setting FIFO watermarks - A: plane=40, cursor=2, B: plane=2, cursor=2, SR: plane=0, cursor=0
Feb 19 07:20:00 localhost kernel: [49670.747858] [drm:intel_crtc_set_config] [CRTC:9] [FB:47] #connectors=1 (x y) (0 0)
Feb 19 07:20:00 localhost kernel: [49670.747862] [drm:intel_set_config_compute_mode_changes] computed changes for [CRTC:9], mode_changed=0, fb_changed=1
Feb 19 07:20:00 localhost kernel: [49670.747865] [drm:intel_modeset_stage_output_state] [CONNECTOR:13:VGA-1] to [CRTC:9]
Feb 19 07:20:00 localhost kernel: [49670.747867] [drm:intel_modeset_affected_pipes] set mode pipe masks: modeset: 1, prepare: 1, disable: 0
Feb 19 07:20:00 localhost kernel: [49670.747870] [drm:connected_sink_compute_bpp] [CONNECTOR:13:VGA-1] checking for sink bpp constrains
Feb 19 07:20:00 localhost kernel: [49670.747872] [drm:intel_modeset_pipe_config] plane bpp: 24, pipe bpp: 24, dithering: 0
Feb 19 07:20:00 localhost kernel: [49670.747874] [drm:intel_dump_pipe_config] [CRTC:9][modeset] config for pipe A
Feb 19 07:20:00 localhost kernel: [49670.747875] [drm:intel_dump_pipe_config] cpu_transcoder: A
Feb 19 07:20:00 localhost kernel: [49670.747876] [drm:intel_dump_pipe_config] pipe bpp: 24, dithering: 0
Feb 19 07:20:00 localhost kernel: [49670.747878] [drm:intel_dump_pipe_config] fdi/pch: 0, lanes: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
Feb 19 07:20:00 localhost kernel: [49670.747879] [drm:intel_dump_pipe_config] dp: 0, gmch_m: 0, gmch_n: 0, link_m: 0, link_n: 0, tu: 0
Feb 19 07:20:00 localhost kernel: [49670.747881] [drm:intel_dump_pipe_config] dp: 0, gmch_m2: 0, gmch_n2: 0, link_m2: 0, link_n2: 0, tu2: 0
Feb 19 07:20:00 localhost kernel: [49670.747882] [drm:intel_dump_pipe_config] audio: 0, infoframes: 0
Feb 19 07:20:00 localhost kernel: [49670.747882] [drm:intel_dump_pipe_config] requested mode:
Feb 19 07:20:00 localhost kernel: [49670.747885] [drm:drm_mode_debug_printmodeline] Modeline 0:"1680x1050" 60 119000 1680 1728 1760 1840 1050 1053 1059 1080 0x48 0xa
Feb 19 07:20:00 localhost kernel: [49670.747886] [drm:intel_dump_pipe_config] adjusted mode:
Feb 19 07:20:00 localhost kernel: [49670.747889] [drm:drm_mode_debug_printmodeline] Modeline 0:"1680x1050" 60 119000 1680 1728 1760 1840 1050 1053 1059 1080 0x48 0xa
Feb 19 07:20:00 localhost kernel: [49670.747891] [drm:intel_dump_crtc_timings] crtc timings: 119000 1680 1728 1760 1840 1050 1053 1059 1080, type: 0x48 flags: 0xa
Feb 19 07:20:00 localhost kernel: [49670.747892] [drm:intel_dump_pipe_config] port clock: 119000
Feb 19 07:20:00 localhost kernel: [49670.747893] [drm:intel_dump_pipe_config] pipe src size: 1680x1050
Feb 19 07:20:00 localhost kernel: [49670.747894] [drm:intel_dump_pipe_config] gmch pfit: control: 0x00000000, ratios: 0x00000000, lvds border: 0x00000000
Feb 19 07:20:00 localhost kernel: [49670.747896] [drm:intel_dump_pipe_config] pch pfit: pos: 0x00000000, size: 0x00000000, disabled
Feb 19 07:20:00 localhost kernel: [49670.747897] [drm:intel_dump_pipe_config] ips: 0
Feb 19 07:20:00 localhost kernel: [49670.747897] [drm:intel_dump_pipe_config] double wide: 0
Feb 19 07:20:00 localhost kernel: [49670.747912] [drm:i9xx_update_primary_plane] Writing base 00546000 00000000 0 0 6720
Feb 19 07:20:00 localhost kernel: [49670.844013] ------------[ cut here ]------------
Feb 19 07:20:00 localhost kernel: [49670.844035] WARNING: CPU: 0 PID: 1035 at /home/kernel/COD/linux/drivers/gpu/drm/drm_irq.c:1130 drm_wait_one_vblank+0x12f/0x180 [drm]()
Feb 19 07:20:00 localhost kernel: [49670.844035] vblank wait timed out on crtc 0
Feb 19 07:20:00 localhost kernel: [49670.844064] Modules linked in: usblp(E) ses(E) snd_hda_codec_analog(E) enclosure(E) snd_hda_codec_generic(E) i915(E) snd_hda_intel(E) snd_hda_controller(E) snd_hda_codec(E) coretemp(E) snd_hwdep(E) snd_pcm(E) uas(E) gpio_ich(E) dell_wmi(E) usb_storage(E) dcdbas(E) sparse_keymap(E) kvm(E) snd_seq_midi(E) video(E) joydev(E) snd_seq_midi_event(E) snd_rawmidi(E) drm_kms_helper(E) drm(E) snd_seq(E) snd_seq_device(E) serio_raw(E) snd_timer(E) bnep(E) rfcomm(E) lpc_ich(E) snd(E) i2c_algo_bit(E) bluetooth(E) soundcore(E) 8250_fintek(E) ppdev(E) wmi(E) shpchp(E) lp(E) mac_hid(E) parport_pc(E) parport(E) binfmt_misc(E) hid_generic(E) usbhid(E) psmouse(E) pata_acpi(E) hid(E) e1000e(E) ptp(E) pps_core(E)

I'm not sure now how to proceed however I will continue to run the 3.19.0 kernel.