On Fri, 23 Oct 2015, Eric Biggers <ebiggers3@xxxxxxxxx> wrote: > Hi, > > I am testing Linux v4.3-rc6 on a laptop with Intel 'Skylake' integrated > graphics. The integrated display works, but I noticed several warnings in the > kernel log, and a VGA monitor attached to the HDMI input via a VGA->HDMI adapter > did not work. Furthermore, the system hung for several seconds during boot. > The two WARNs were: > > [ 1.078097] WARNING: CPU: 0 PID: 1 at drivers/gpu/drm/i915/intel_pm.c:3321 skl_update_pipe_wm+0x7fa/0x810() > [ 1.078097] WARN_ON(p->pixel_rate == 0) Please file two separate bugs at [1], one for the above, and another for the below. Please add drm.debug=14 module parameter, and attach dmesg all the way from boot to the problem. Thanks, Jani. [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel > ... > [ 1.353670] WARNING: CPU: 1 PID: 6 at drivers/gpu/drm/i915/intel_dp.c:854 intel_dp_aux_ch+0x10f/0x6a0() > [ 1.353670] dp_aux_ch not started status 0xad40001f > > The following error was reported later, when the HDMI input was connected but > the driver failed to report the input as connected: > > [ 52.553940] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 130 > > I have attached the full 'dmesg' output for anyone who may find it useful. > > Eric > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel -- Jani Nikula, Intel Open Source Technology Center _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
