Hello guys,
Running xorg on my Lenovo Yoga 2 Pro (MY2013) on recent kernels turn into a major PITA. After a couple of minutes the screen starts to flicker and only killing xorg or reboot fixes the problem. This is what i typically see in dmesg:
[ 0.000000] microcode: microcode updated early to revision 0x1d, date = 2015-08-13 [ 0.000000] Linux version 4.7.0-rc3 (petkan@yoga) (gcc version 6.1.1 20160519 (Debian 6.1.1-4) ) #5 SMP Mon Jun 13 12:41:31 EEST 2016 [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-4.7.0-rc3 root=/dev/sda1 ro quiet ... [ 0.104213] smpboot: CPU0: Intel(R) Core(TM) i7-4500U CPU @ 1.80GHz (family: 0x6, model: 0x45, stepping: 0x1) ... [ 1.033691] [drm] Initialized drm 1.1.0 20060810 [ 1.034106] [drm] Memory usable by graphics device = 2048M [ 1.034108] [drm] Replacing VGA console driver [ 1.040787] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). [ 1.040788] [drm] Driver supports precise vblank timestamp query. [ 1.066820] [drm] Initialized i915 1.6.0 20160425 for 0000:00:02.0 on minor 0 [ 1.231007] fbcon: inteldrmfb (fb0) is primary device [ 2.524538] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device ... [ 92.825302] [drm:intel_set_cpu_fifo_underrun_reporting] *ERROR* uncleared fifo underrun on pipe A [ 92.825312] [drm:ironlake_irq_handler] *ERROR* CPU pipe A FIFO underrun
This is going on for all v4.6 kernel releases as well as v4.7-rcX. Older, v4.4 and v4.5, kernels are running fine. I'm using Debian testing updated to 2016-06-13.
I'd be happy to help with testing so please let me know if there's anything i can do for you.
cheers, Petko