Created attachment 122772 [details] two faults I know others have seen this error, but I'll add it if folks want the logs. I'm using Ubuntu 14.04, the kernel is drm-intel-nightly, but I ran into compile issues with libdrm so everything else is the latest Ubuntu. Some more details; arch: x86_64 kernel: 4.6.0-rc2+ (drm-intel-nightly from 4/4/16) Machine: NUC6I5SYH (i5-6260U) Display: HDMI & DP First I captured dmesg & card0/error without the drm.debug command line option, this is the f1 folder in the bz2, but then I saw the note about wanting that so the f2_dbg_cmdline folder is with "drm.debug=0x1e log_buf_len=1M" In both of these cases the screens freeze, but the mouse continues to work, then about 10-20 seconds later it comes back to normal. There is a message in the lower right corner "KWin Window Manager, desktop effects were restarted due to a graphics restart" I've also had instances where both the screens & mouse freeze, and when this happens a reboot is needed even ssh doesn't work. thanks, Paul
This seems to be cleared up with BIOS update 39.
Closing since this is BIOS update fixed it. As reference, from these error dumps (this is similar so taking ACTHD from 1st one), hung is happening in render ring batch with active head at 0xfa870f00, with 0x7a000004 (PIPE_CONTROL) as IPEHR. Batch extract (around 0xfa870f00): 0xfa870cf0: 0x00000000: MI_NOOP Bad length 7 in (null), expected 6-6 0xfa870cf4: 0x7b000005: 3DPRIMITIVE: fail sequential 0xfa870cf8: 0x00000004: vertex count 0xfa870cfc: 0x00000006: start vertex 0xfa870d00: 0x00000000: instance count 0xfa870d04: 0x00000001: start instance 0xfa870d08: 0x00000000: index bias 0xfa870d0c: 0x00000000: MI_NOOP Bad count in PIPE_CONTROL 0xfa870d10: 0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC write flush, no inst flush 0xfa870d14: 0x00000000: destination address 0xfa870d18: 0x00000000: immediate dword low 0xfa870d1c: 0x00000000: immediate dword high Bad count in PIPE_CONTROL 0xfa870d28: 0x7a000004: PIPE_CONTROL: no write, no depth stall, no RC write flush, no inst flush 0xfa870d2c: 0x00101c11: destination address 0xfa870d30: 0x00000000: immediate dword low 0xfa870d34: 0x00000000: immediate dword high 0xfa870d40: 0x78230000: 3D UNKNOWN: 3d_965 opcode = 0x7823 0xfa870d44: 0x00007480: MI_NOOP
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