In my case such reports seems often precede the complete lock-down of the system. It used to work just fine, and I don't see similar *ERROR* messages in older entries, but with some recent upgrade within testing/sid things became really unstable. Seems I get into complete lockdown once or twice daily, couldn't figure out any trigger yet, but here is the traceback and some surrounding events I see in the journal:
Oct 25 12:23:39 hopa systemd[1]: Started Cleanup of Temporary Directories. Oct 25 12:25:01 hopa CRON[8616]: pam_unix(cron:session): session opened for user root by (uid=0) Oct 25 12:25:01 hopa CRON[8617]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1) Oct 25 12:25:01 hopa CRON[8616]: pam_unix(cron:session): session closed for user root Oct 25 12:30:16 hopa kernel: AIF:PRIV UDP broadcast: IN=wlan0 OUT= MAC=ff:ff:ff:ff:ff:ff:0c:8b:fd:7f:6f:39:08:00 SRC=0.0.0.0 DST=255.255.255.255 LEN=333 TOS=0x00 PREC=0x00 TTL=128 ID=26862 PROTO=UDP SPT=68 DPT=67 LE Oct 25 12:30:24 hopa kernel: AIF:PRIV UDP broadcast: IN=wlan0 OUT= MAC=ff:ff:ff:ff:ff:ff:0c:8b:fd:7f:6f:39:08:00 SRC=0.0.0.0 DST=255.255.255.255 LEN=333 TOS=0x00 PREC=0x00 TTL=128 ID=26863 PROTO=UDP SPT=68 DPT=67 LE Oct 25 12:34:45 hopa systemd-logind[1338]: Lid opened. Oct 25 12:34:45 hopa kernel: i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment Oct 25 12:34:45 hopa kernel: [drm:check_crtc_state [i915]] *ERROR* mismatch in ips_enabled (expected 1, found 0) Oct 25 12:34:45 hopa kernel: ------------[ cut here ]------------ Oct 25 12:34:45 hopa kernel: WARNING: CPU: 0 PID: 2215 at /build/linux-9oV2VH/linux-4.2.3/drivers/gpu/drm/i915/intel_display.c:12324 check_crtc_state+0x931/0x1060 [i915]() Oct 25 12:34:45 hopa kernel: pipe state doesn't match! Oct 25 12:34:45 hopa kernel: Modules linked in: fuse ctr ccm rfcomm pci_stub vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) bnep xt_hl xt_pkttype nf_log_ipv4 nf_log_common xt_tcpudp ip6table_mangle iptable_nat nf Oct 25 12:34:45 hopa kernel: btrtl videobuf2_core btbcm btintel radeon snd_hda_codec_hdmi v4l2_common serio_raw bluetooth videodev i2c_i801 media lpc_ich i915 rtsx_pci_ms snd_hda_intel iwlwifi memstick snd_hda_code Oct 25 12:34:45 hopa kernel: cryptd scsi_mod ehci_pci ehci_hcd rtsx_pci mfd_core xhci_pci xhci_hcd e1000e ptp usbcore pps_core usb_common thermal thermal_sys Oct 25 12:34:45 hopa kernel: CPU: 0 PID: 2215 Comm: Xorg Tainted: G W O 4.2.0-1-amd64 #1 Debian 4.2.3-2 Oct 25 12:34:45 hopa kernel: Hardware name: Hewlett-Packard HP ZBook 14/198F, BIOS L71 Ver. 01.20 07/28/2014 Oct 25 12:34:45 hopa kernel: 0000000000000000 ffffffffa08f51f0 ffffffff81548ea6 ffff88041a00f858 Oct 25 12:34:45 hopa kernel: ffffffff8106e5a1 ffff880437ae8000 ffff88043a88b000 ffff88043a584400 Oct 25 12:34:45 hopa kernel: ffff8800369d0000 0000000000000001 ffffffff8106e61a ffffffffa0903b93 Oct 25 12:34:45 hopa kernel: Call Trace: Oct 25 12:34:45 hopa kernel: [<ffffffff81548ea6>] ? dump_stack+0x40/0x50 Oct 25 12:34:45 hopa kernel: [<ffffffff8106e5a1>] ? warn_slowpath_common+0x81/0xb0 Oct 25 12:34:45 hopa kernel: [<ffffffff8106e61a>] ? warn_slowpath_fmt+0x4a/0x50 Oct 25 12:34:45 hopa kernel: [<ffffffffa0889771>] ? check_crtc_state+0x931/0x1060 [i915] Oct 25 12:34:45 hopa kernel: [<ffffffffa0865e63>] ? i915_get_crtc_scanoutpos+0x193/0x240 [i915] Oct 25 12:34:45 hopa kernel: [<ffffffffa089c6ab>] ? intel_modeset_check_state+0x20b/0xb30 [i915] Oct 25 12:34:45 hopa kernel: [<ffffffffa089dd51>] ? intel_crtc_set_config+0x531/0x590 [i915] Oct 25 12:34:45 hopa kernel: [<ffffffffa05afb2c>] ? drm_crtc_check_viewport+0x2c/0xe0 [drm] Oct 25 12:34:45 hopa kernel: [<ffffffffa05b143e>] ? drm_mode_set_config_internal+0x5e/0xf0 [drm] Oct 25 12:34:45 hopa kernel: [<ffffffffa05b5385>] ? drm_mode_setcrtc+0x185/0x4e0 [drm] Oct 25 12:34:45 hopa kernel: [<ffffffffa05a70b2>] ? drm_ioctl+0x172/0x550 [drm] Oct 25 12:34:45 hopa kernel: [<ffffffff810cf4f1>] ? hrtimer_start_range_ns+0x1b1/0x3a0 Oct 25 12:34:45 hopa kernel: [<ffffffff811ca5c3>] ? do_vfs_ioctl+0x2c3/0x4a0 Oct 25 12:34:45 hopa kernel: [<ffffffff814410cd>] ? __sys_recvmsg+0x5d/0x70 Oct 25 12:34:45 hopa kernel: [<ffffffff811ca816>] ? SyS_ioctl+0x76/0x90 Oct 25 12:34:45 hopa kernel: [<ffffffff8154e5f2>] ? system_call_fast_compare_end+0xc/0x6b Oct 25 12:34:45 hopa kernel: ---[ end trace 85d7fb674c590ac9 ]--- Oct 25 12:35:01 hopa CRON[8913]: pam_unix(cron:session): session opened for user root by (uid=0) Oct 25 12:35:01 hopa CRON[8914]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1) Oct 25 12:35:01 hopa CRON[8913]: pam_unix(cron:session): session closed for user root Oct 25 12:35:25 hopa sudo[8952]: yoh : TTY=pts/2 ; PWD=/home/yoh/deb/gits/pkg-exppsy/ants ; USER=root ; COMMAND=/bin/mount -o remount,size=1900m /tmp Oct 25 12:35:25 hopa sudo[8952]: pam_unix(sudo:session): session opened for user root by yoh(uid=0) Oct 25 12:35:25 hopa sudo[8952]: pam_unix(sudo:session): session closed for user root Oct 25 12:36:37 hopa systemd-logind[1338]: Lid closed. Oct 25 12:36:37 hopa kernel: i915 0000:00:02.0: BAR 6: [??? 0x00000000 flags 0x2] has bogus alignment Oct 25 12:36:37 hopa gnome-session[1713]: Window manager warning: Failed to read EDID of output eDP32: No such file or directory Oct 25 12:39:01 hopa CRON[12111]: pam_unix(cron:session): session opened for user root by (uid=0) Oct 25 12:39:01 hopa CRON[12112]: (root) CMD ( [ -x /usr/lib/php5/sessionclean ] && /usr/lib/php5/sessionclean) Oct 25 12:39:01 hopa CRON[12111]: pam_unix(cron:session): session closed for user root Oct 25 12:43:29 hopa kernel: wlan0: cannot understand ECSA IE operating class 33, disconnecting Oct 25 12:43:29 hopa wpa_supplicant[1772]: wlan0: CTRL-EVENT-DISCONNECTED bssid=c4:3d:c7:57:1f:ce reason=4 locally_generated=1 Oct 25 12:43:29 hopa NetworkManager[1388]: <warn> Connection disconnected (reason -4) Oct 25 12:43:29 hopa wpa_supplicant[1772]: wlan0: CTRL-EVENT-REGDOM-CHANGE init=CORE type=WORLD -- Yaroslav O. Halchenko Center for Open Neuroscience http://centerforopenneuroscience.org Dartmouth College, 419 Moore Hall, Hinman Box 6207, Hanover, NH 03755 Phone: +1 (603) 646-9834 Fax: +1 (603) 646-1419 WWW: http://www.linkedin.com/in/yarik
