On 10/7/15, Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> wrote: > On Tue, Oct 06, 2015 at 11:42:33AM -0400, Nick Bowler wrote: >> On 9/24/15, Nick Bowler <nbowler@xxxxxxxxxx> wrote: >> > Testing out 4.3-rc2, first thing I notice is that the VGA output is >> > not working. Specifically, the display is continuously powering on >> > and off -- at no point is any image visible on the screen (I am >> > expecting to see the console output). The display connected to the >> > HDMI output is working fine. [...] >> b8afb9113c519a8bd742f7df8c424b0af69a75cd is the first bad commit >> commit b8afb9113c519a8bd742f7df8c424b0af69a75cd >> Author: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> >> Date: Mon Jun 29 15:25:48 2015 +0300 >> >> drm/i915: Keep GMCH DPLL VGA mode always disabled [...] > @@ -1790,13 +1790,13 @@ static void i9xx_disable_pll(struct intel_crtc > *crtc) > /* Make sure the pipe isn't still relying on us */ > assert_pipe_disabled(dev_priv, pipe); > > - I915_WRITE(DPLL(pipe), 0); > + I915_WRITE(DPLL(pipe), DPLL_VGA_MODE_DIS); > POSTING_READ(DPLL(pipe)); > } > > > That hunk is the only relevant part for your machine. Can you try to revert > just that manually? > > But I'm really surprised that would have any effect since we only used > to enable "VGA mode" when the DPLL is off. And when the DPLL is off, > there's nothing on the screen anyway. Nevertheless, manually reverting just that hunk seems to fix it. Thanks, Nick _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
