My system locks up several times a week. There is nothing that I know of that can trigger it, it happens whether I use one monitor or two. The symptom is that the applications windows become unresponsive, then eventually also the mouse pointer, then eventually even the consoles. As far as I can tell it is associated with the log messages below from /var/log/kern.log
Pressing the power button as per normal will initiate a shutdown but without any log entries. Sometimes it can go a week with no problems other times, it can fail twice in one day.
My system locks up several times a week. There is nothing that I know of that can trigger it, it happens whether I use one monitor or two. The symptom is that the applications windows become unresponsive, then eventually also the mouse pointer, then eventually even the consoles. As far as I can tell it is associated with the log messages below from /var/log/kern.log
Pressing the power button as per normal will initiate a shutdown but without any log entries. Sometimes it can go a week with no problems other times, it can fail twice in one day.
Apr 20 22:36:59 gazp9 kernel: [19642.008582] ------------[ cut here ]------------ linux-lts- utopic- vy2yyy/ linux-lts- utopic- 3.16.0/ drivers/ gpu/drm/ i915/intel_ display. c:3324 intel_crtc_ wait_for_ pending_ flips+0x171/ 0x180 [i915]() temp_thermal xt_LOG intel_powerclamp coretemp xt_recent kvm_intel kvm xt_limit xt_tcpudp crct10dif_pclmul xt_addrtype crc32_pclmul nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack snd_hda_codec_via snd_hda_ codec_generic aesni_intel snd_hda_codec_hdmi aes_x86_64 lrw gf128mul ip6table_filter glue_helper ablk_helper snd_hda_intel cryptd snd_hda_controller ip6_tables snd_hda_codec nf_conntrack_ netbios_ ns nf_conntrack_ broadcast nf_nat_ftp nf_nat nf_conntrack_ftp joydev nf_conntrack snd_usb_audio serio_raw snd_seq_midi iptable_filter snd_usbmidi_lib snd_seq_midi_event snd_hwdep iwlmvm snd_rawmidi ip_tables mac80211 x_tables snd_pcm snd_seq pl2303 usbserial snd_seq_device rtsx_pci_ms iwlwifi snd_timer memstick cfg80211 btusb parport_pc bluetooth ppdev 6lowpan_iphc snd lp mei_me parport mei lpc_ich tpm_infineon mac_hid shpchp soundcore raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq multipath linear hid_generic usbhid hid raid0 raid1 rtsx_pci_sdmmc i915 psmouse r8169 ahci libahci rtsx_pci mii i2c_algo_bit drm_kms_helper drm wmi video e17>] dump_stack+ 0x64/0x82 f1d>] warn_slowpath_ common+ 0x7d/0xa0 ffa>] warn_slowpath_ null+0x1a/ 0x20 9f1>] intel_crtc_ wait_for_ pending_ flips+0x171/ 0x180 [i915] 460>] ? prepare_ to_wait_ event+0x100/ 0x100 229>] intel_crtc_ set_config+ 0x959/0xdb0 [i915] 4c1>] drm_mode_ set_config_ internal+ 0x61/0xe0 [drm] b33>] restore_ fbdev_mode+ 0xb3/0xe0 [drm_kms_helper] 775>] drm_fb_ helper_ restore_ fbdev_mode_ unlocked+ 0x25/0x70 [drm_kms_helper] 7e2>] drm_fb_ helper_ set_par+ 0x22/0x50 [drm_kms_helper] 9b1>] fb_set_ var+0x191/ 0x430 9f1>] fbcon_blank+ 0x1d1/0x2d0 1b8>] do_unblank_ screen+ 0xb8/0x1f0 13a>] complete_ change_ console+ 0x5a/0xe0 15c>] vt_ioctl+ 0xf9c/0x11b0 8cd>] tty_ioctl+ 0x26d/0xbc0 7c8>] ? fsnotify+ 0x228/0x2f0 d80>] do_vfs_ ioctl+0x2e0/ 0x4c0 2b1>] ? __sb_end_ write+0x31/ 0x60 fe1>] SyS_ioctl+0x81/0xa0 58d>] system_ call_fastpath+ 0x1a/0x1f pipe_set_ base] *ERROR* pipe is still busy with an old pageflip
Apr 20 22:36:59 gazp9 kernel: [19642.008657] WARNING: CPU: 0 PID: 1810 at /build/
Apr 20 22:36:59 gazp9 kernel: [19642.008695] Modules linked in: nls_iso8859_1 mmc_block hidp ec_sys cuse rfcomm bnep dm_crypt arc4 ip6t_REJECT xt_hl ip6t_rt nf_conntrack_ipv6 nf_defrag_ipv6 intel_rapl ipt_REJECT x86_pkg_
Apr 20 22:36:59 gazp9 kernel: [19642.008728] CPU: 0 PID: 1810 Comm: Xorg Not tainted 3.16.0-70-generic #90~14.04.1-Ubuntu
Apr 20 22:36:59 gazp9 kernel: [19642.008729] Hardware name: System76, Inc. Gazelle Professional /Gazelle Professional , BIOS 1.03.03RS76 01/15/2014
Apr 20 22:36:59 gazp9 kernel: [19642.008733] 0000000000000000 ffff8800d093f9a8 ffffffff81769e17 0000000000000000
Apr 20 22:36:59 gazp9 kernel: [19642.008736] 0000000000000009 ffff8800d093f9e0 ffffffff8106ef1d 0000000000000000
Apr 20 22:36:59 gazp9 kernel: [19642.008738] ffff880213fe7000 ffff880210628238 ffff880036357000 ffff880036357368
Apr 20 22:36:59 gazp9 kernel: [19642.008739] Call Trace:
Apr 20 22:36:59 gazp9 kernel: [19642.008749] [<ffffffff81769
Apr 20 22:36:59 gazp9 kernel: [19642.008756] [<ffffffff8106e
Apr 20 22:36:59 gazp9 kernel: [19642.008760] [<ffffffff8106e
Apr 20 22:36:59 gazp9 kernel: [19642.008795] [<ffffffffc0468
Apr 20 22:36:59 gazp9 kernel: [19642.008802] [<ffffffff810b6
Apr 20 22:36:59 gazp9 kernel: [19642.008838] [<ffffffffc0472
Apr 20 22:36:59 gazp9 kernel: [19642.008870] [<ffffffffc02e4
Apr 20 22:36:59 gazp9 kernel: [19642.008884] [<ffffffffc0342
Apr 20 22:36:59 gazp9 kernel: [19642.008897] [<ffffffffc0344
Apr 20 22:36:59 gazp9 kernel: [19642.008908] [<ffffffffc0344
Apr 20 22:36:59 gazp9 kernel: [19642.008912] [<ffffffff81404
Apr 20 22:36:59 gazp9 kernel: [19642.008918] [<ffffffff813fb
Apr 20 22:36:59 gazp9 kernel: [19642.008922] [<ffffffff81487
Apr 20 22:36:59 gazp9 kernel: [19642.008926] [<ffffffff8147d
Apr 20 22:36:59 gazp9 kernel: [19642.008928] [<ffffffff8147e
Apr 20 22:36:59 gazp9 kernel: [19642.008936] [<ffffffff81471
Apr 20 22:36:59 gazp9 kernel: [19642.008941] [<ffffffff81213
Apr 20 22:36:59 gazp9 kernel: [19642.008945] [<ffffffff811e8
Apr 20 22:36:59 gazp9 kernel: [19642.008949] [<ffffffff811d8
Apr 20 22:36:59 gazp9 kernel: [19642.008952] [<ffffffff811e8
Apr 20 22:36:59 gazp9 kernel: [19642.008957] [<ffffffff81772
Apr 20 22:36:59 gazp9 kernel: [19642.008959] ---[ end trace 77f6d66e45d93b9f ]---
Apr 20 22:36:59 gazp9 kernel: [19642.008964] [drm:intel_
Apr 20 22:40:49 gazp9 kernel: [19872.483621] usb 3-3.4: current rate 0 is different from the runtime rate 44100
Apr 20 22:40:49 gazp9 kernel: [19872.484077] usb 3-3.4: current rate 0 is different from the runtime rate 44100
Apr 20 22:43:34 gazp9 kernel: [ 0.000000] Initializing cgroup subsys cpuset
ProblemType: Bug 3.16.0- 70-generic 3.16.0- 70.90~14. 04.1 ature: Ubuntu 3.16.0- 70.90~14. 04.1-generic 3.16.7-ckt25
DistroRelease: Ubuntu 14.04
Package: linux-image-
ProcVersionSign
Uname: Linux 3.16.0-70-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Apr 21 10:31:14 2016
InstallationDate: Installed on 2015-03-27 (390 days ago)
InstallationMedia: Ubuntu-Server 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)