I am having an issue where my Macmini6,1 is hard freezing (no keyboard control, have to power off and power back on using the power button) when attempting to display a random video at random times but always freezing when the video should be displayed by VLC during the start of the video. I am suspecting it may be the i915 driver communicating with the Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) graphics controller. I'm having a problem debugging and pinpointing exactly what might be freezing. and any help would be appreciated. This MacMini is basically a simple kiosk that plays an mp4 video downloaded from Youtube; the video plays, exits, and the next video plays ad infinitum.
The final message from vlc -vvv when the system freezes:
[0x7f91f0001248] xcb vout display debug: display is visible
The final message from vlc -vvv when the system freezes:
[0x7f91f0001248] xcb vout display debug: display is visible
With default kernel / device logging verbosities nothing is logged to /var/log/syslog or /var/log/kern.log when the system freezes.
Package: xserver-xorg-video-intel
Version: 2:2.20.0-0ubuntu0~precise1
vlc version: 2.2.0~~git20131009+r3076-0~r106+100~ubuntu12.04.1
I enabled some verbose debug options from grub to enable more verbose output today:
rootwait ignore_loglevel debug debug_locks_verbose=1 sched_debug initcall_debug mminit_loglevel=4 udev.log_priority=8 loglevel=8 earlyprintk=vga,keep log_buf_len=10M print_fatal_signals=1 apm.debug=Y i8042.debug=Y drm.debug=1 scsi_logging_level=1 usbserial.debug=Y option.debug=Y pl2303.debug=Y firewire_ohci.debug=1 hid.debug=1 pci_hotplug.debug=Y pci_hotplug.debug_acpi=Y shpchp.shpchp_debug=Y apic=debug show_lapic=all hpet=verbose lmb=debug pause_on_oops=5 panic=10 sysrq_always_enabled
rootwait ignore_loglevel debug debug_locks_verbose=1 sched_debug initcall_debug mminit_loglevel=4 udev.log_priority=8 loglevel=8 earlyprintk=vga,keep log_buf_len=10M print_fatal_signals=1 apm.debug=Y i8042.debug=Y drm.debug=1 scsi_logging_level=1 usbserial.debug=Y option.debug=Y pl2303.debug=Y firewire_ohci.debug=1 hid.debug=1 pci_hotplug.debug=Y pci_hotplug.debug_acpi=Y shpchp.shpchp_debug=Y apic=debug show_lapic=all hpet=verbose lmb=debug pause_on_oops=5 panic=10 sysrq_always_enabled
These debugging options enabled drm:drm_ioctl to create 576 messages per second being written to /var/log/syslog and /var/log/kern.log. These messages are being generated while the system is operating normally displaying an mp4 video via VLC.
Can you please help me out with what these debug messages mean? Are they benign?
Here is the condensed version of the messages from /var/log/kern.log:
msg_count, msg
240 [drm:drm_ioctl], pid=1416, cmd=0x4020645d, nr=0x5d, dev 0xe200, auth=1
144 [drm:drm_ioctl], pid=1416, cmd=0xc00c6466, nr=0x66, dev 0xe200, auth=1
96 [drm:drm_ioctl], pid=1416, cmd=0xc0086457, nr=0x57, dev 0xe200, auth=1
24 [drm:drm_ioctl], pid=1416, cmd=0xc06864a1, nr=0xa1, dev 0xe200, auth=1
24 [drm:drm_ioctl], pid=1416, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
24 [drm:drm_ioctl], pid=1416, cmd=0x40406469, nr=0x69, dev 0xe200, auth=1
24 [drm:drm_ioctl], pid=1416, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
msg_count, msg
240 [drm:drm_ioctl], pid=1416, cmd=0x4020645d, nr=0x5d, dev 0xe200, auth=1
144 [drm:drm_ioctl], pid=1416, cmd=0xc00c6466, nr=0x66, dev 0xe200, auth=1
96 [drm:drm_ioctl], pid=1416, cmd=0xc0086457, nr=0x57, dev 0xe200, auth=1
24 [drm:drm_ioctl], pid=1416, cmd=0xc06864a1, nr=0xa1, dev 0xe200, auth=1
24 [drm:drm_ioctl], pid=1416, cmd=0x6458, nr=0x58, dev 0xe200, auth=1
24 [drm:drm_ioctl], pid=1416, cmd=0x40406469, nr=0x69, dev 0xe200, auth=1
24 [drm:drm_ioctl], pid=1416, cmd=0x400c645f, nr=0x5f, dev 0xe200, auth=1
Once I understand these messages I'm going to wait for the system to fail and see if there are different or new debug messages. Thanks in advance for your help! I'm willing to troubleshoot and try different things to determine the root cause of this freezing.
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Thank you,
Preston Connors
407-283-7806
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