Re: r277959 breaks X display on IvyBridge mobile GT2 IG

Hi,

There's a "invert backlight" option in i915, try setting it to 1?


-a


On 11 February 2015 at 07:41, Ian FREISLICH <ianf_at_capeaugusta.com> wrote:
> Hi
>
> With this commit my display blanks and never lights up when X starts.
>
> [zen] /usr/src # svn diff -r 277958:277959
> Index: sys/dev/drm2/i915/intel_display.c
> ===================================================================
> --- sys/dev/drm2/i915/intel_display.c   (revision 277958)
> +++ sys/dev/drm2/i915/intel_display.c   (revision 277959)
> _at__at_ -6995,7 +6995,7 _at__at_
>          */
>         I915_WRITE(BLC_PWM_CPU_CTL2, PWM_ENABLE);
>         I915_WRITE(BLC_PWM_CPU_CTL, 0);
> -       I915_WRITE(BLC_PWM_PCH_CTL1, PWM_ENABLE | (1<<30));
> +       I915_WRITE(BLC_PWM_PCH_CTL1, PWM_ENABLE);
>  }
>
>  void intel_modeset_init_hw(struct drm_device *dev)
>
>
> vgapci0_at_pci0:0:2:0:     class=0x030000 card=0x15171043 chip=0x01668086 rev=0x09
> hdr=0x00
>     vendor     = 'Intel Corporation'
>     device     = '3rd Gen Core processor Graphics Controller'
>     class      = display
>     subclass   = VGA
>     cap 05[90] = MSI supports 1 message enabled with 1 message
>     cap 01[d0] = powerspec 2  supports D0 D3  current D0
>     cap 13[a4] = PCI Advanced Features: FLR TP
>
> Ian
>
> --
> Ian Freislich
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