On Mon, Feb 08, 2016 at 12:17:07PM +0200, Oleksandr Natalenko wrote: > Hi. > > With Linux 4.4 external HDMI-attached monitor in not discovered by i915 > driver. Here is boot log related to drm and i915 for Linux 4.4/4.4.1 kernel: > > === > kernel: [drm] Initialized drm 1.1.0 20060810 > kernel: [drm] Memory usable by graphics device = 2048M > kernel: [drm] Replacing VGA console driver > kernel: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). > kernel: [drm] Driver supports precise vblank timestamp query. > kernel: [drm] Initialized i915 1.6.0 20151010 for 0000:00:02.0 on minor 0 > kernel: i915 0000:00:02.0: No connectors reported connected with modes > kernel: [drm] Cannot find any crtc or sizes - going 1024x768 > kernel: i915 0000:00:02.0: fb0: inteldrmfb frame buffer device > === > > i915 is unable to find any connectors. Reattaching HDMI cable does not help. > Note, we are talking about in-kernel i915 drm with no X involved (launching > X does not change anything, though). > > Linux 4.3 worked OK. Here is boot log for 4.3 kernel: > > === > kernel: [drm] Initialized drm 1.1.0 20060810 > kernel: [drm] Memory usable by graphics device = 2048M > kernel: [drm] Replacing VGA console driver > kernel: [drm] Supports vblank timestamp caching Rev 2 (21.10.2013). > kernel: [drm] Driver supports precise vblank timestamp query. > kernel: [drm] Initialized i915 1.6.0 20150731 for 0000:00:02.0 on minor 0 > kernel: [drm:intel_set_pch_fifo_underrun_reporting [i915]] *ERROR* uncleared > pch fifo underrun on pch transcoder A > kernel: [drm:intel_pch_fifo_underrun_irq_handler [i915]] *ERROR* PCH > transcoder A FIFO underrun > kernel: i915 0000:00:02.0: fb0: inteldrmfb frame buffer device > === > > Hardware: > > === > [~]$ lscpu | grep "Model name" > Model name: Intel(R) Pentium(R) CPU G2020 @ 2.90GHz > > [~]$ lspci | grep VGA > 00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen > Core processor Graphics Controller (rev 09) > === > > and xrandr output (with 4.3 kernel): > > === > [~]$ xrandr --listproviders > Providers: number : 1 > Provider 0: id: 0x47 cap: 0xb, Source Output, Sink Output, Sink Offload > crtcs: 4 outputs: 4 associated providers: 0 name:Intel > > [~]$ xrandr > Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767 > DP1 disconnected (normal left inverted right x axis y axis) > HDMI1 connected primary 1920x1080+0+0 (normal left inverted right x axis y > axis) 510mm x 290mm > 1920x1080 60.00*+ 50.00 59.94 > 1920x1080i 60.00 50.00 59.94 > 1680x1050 59.88 > 1400x1050 59.95 > 1600x900 60.00 > 1280x1024 60.02 > 1440x900 59.90 > 1280x800 59.91 > 1152x864 59.97 > 1280x720 60.00 50.00 59.94 > 1024x768 60.00 > 800x600 60.32 > 720x576 50.00 > 720x480 60.00 59.94 > 640x480 60.00 59.94 > VGA1 disconnected (normal left inverted right x axis y axis) > VIRTUAL1 disconnected (normal left inverted right x axis y axis) > === > > Ideas? Can you please retest with latest -rc? There's been some bugs in the HDMI detection changes, which should be fixed now. If that doesn't help please try to bisect which exact change caused the regression. Thanks, Daniel -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
