Kernel 4.5.0-rc4 x86_64 Laptop TOSHIBA SATELLITE Z30-B with Intel Broadwell: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz Error in the logs: [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe C FIFO underrun [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe A FIFO underrun [drm:intel_cpu_fifo_underrun_irq_handler [i915]] *ERROR* CPU pipe B FIFO underrun With 2 external monitors attached (HDMI and VGA) the VGA display goes blank for a second and comes back. A strange is that the VGA monitor is detected as eDP. I will attach dmesg with 'drm.debug=0x1e log_buf_len=1M' on the kernel command line, xrandr --verbose and Xorg.0.log.
Created attachment 121783 [details] dmesg debug
Created attachment 121784 [details] xorg log
Created attachment 121785 [details] xrandr
Since 22 Feb I run kernel 4.5.0-rc5-mainline and I didn't see any more errors. I'll go ahead and close this.
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