linux-kernel - Re: [Intel-gfx] i915 DVI resolution regression (3.13.7+)

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Message-ID: <CAMVG2suG7ysnci25Cy_+fzvQ8r_R9O2nCuVZf=Zw9t5ZvEOSLQ@mail.gmail.com>
Date:	Tue, 8 Apr 2014 15:32:47 +0800
From:	Daniel J Blueman <daniel@...ra.org>
To:	Jani Nikula <jani.nikula@...ux.intel.com>
Cc:	Ville Syrjälä <ville.syrjala@...ux.intel.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	intel-gfx@...ts.freedesktop.org,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [Intel-gfx] i915 DVI resolution regression (3.13.7+)

On 8 April 2014 15:14, Jani Nikula <jani.nikula@...ux.intel.com> wrote:
> On Tue, 08 Apr 2014, Daniel J Blueman <daniel@...ra.org> wrote:
>> Ville et al,
>>
>> It looks like commit e3ea8fa6beaf55fee64bf816f3b8a80ad733b2c2 (or
>> another commit in 3.13.7) broke modes which require DVI-D dual-link,
>> eg 2560x1440 with my panel.
>>
>> I don't see these modelines in 3.13.7 or later (eg 3.14):
>>
>> [     5.582] (II) intel(0): Modeline "2560x1440"x60.0  312.25  2560
>> 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync (89.5 kHz eP)
>> [     5.582] (II) intel(0): Modeline "2560x1440"x60.0  312.25  2560
>> 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync (89.5 kHz eP)
>> [     5.582] (II) intel(0): Modeline "1920x1200"x59.9  193.25  1920
>> 2056 2256 2592  1200 1203 1209 1245 -hsync +vsync (74.6 kHz e)
>>
>> My monitor is a Dell U2713HM; mobo uses an H87 chipset with i5-4670.
>
> By allowing those modes we regressed setups which were not capable of
> displaying them. So you've got an HDMI->DVI converter?
>
> https://bugzilla.kernel.org/show_bug.cgi?id=72961

I am using a dual-link DVI-D to DVI-D cable to this monitor, since I
previously couldn't get 2560x1440 via HDMI.

If it isn't this commit, then it may be another commit in 3.13.7,
albeit it feels less likely.

Thanks,
  Daniel
-- 
Daniel J Blueman
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