[Bug 73559] [hsw] KMS does not work on Dell XPS 8700

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=73559

Paulo Zanoni <przanoni at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #9 from Paulo Zanoni <przanoni at gmail.com> ---
(In reply to comment #8)
> This is the output of ./tools/intel_reg_read -d 0xc2014 0x42014 0x42020
> 
> 0xC2014 : 0x6
>  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7 
> 6  5  4  3  2  1  0
>   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0 
> 0  0  0  0  1  1  0
> 0x42014 : 0x24000002
>  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7 
> 6  5  4  3  2  1  0
>   0  0  1  0  0  1  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0 
> 0  0  0  0  0  1  0
> 0x42020 : 0x0
>  31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10  9  8  7 
> 6  5  4  3  2  1  0
>   0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0  0 
> 0  0  0  0  0  0  0
> 
> Bit 6 of 0xc2014 is not 1.
> Therefore the patch doesn't work (tested).

That means your machine claims it does have a VGA/CRT output.

It's really weird that the log files say CRT is disconnected, but
drm_setup_crtcs() thinks it's connected... I wonder if there's something wrong
with your framebuffer setup or something like that. Can you please boot the
machine with nomodeset, grab the full "dmesg" and paste it here?

Did you ever boot a distro standard Kernel with a standard .config file? Does
it work?

What happens if you add back that intel_crt_init() call, but instead of booting
your machine with an HDMI monitor, you boot it with a CRT/VGA monitor? Does it
also freeze?

Thanks,
Paulo

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