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Date:      Mon, 5 Jan 2015 15:20:20 +0800 (CST)
From:      Mary <t_mary_9@163.com>
To:        questions@FreeBSD.org
Subject:   Attn:Purchasing IP65 SAA Down Light Easter Industries 1/4/2015 11:20:18 PM
Message-ID:  <64b59124.80ca.14ab8f744d4.Coremail.t_mary_9@163.com>

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From owner-freebsd-questions@FreeBSD.ORG  Mon Jan  5 08:35:52 2015
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Date: Mon, 05 Jan 2015 08:35:37 +0000
From: Arthur Chance <freebsd@qeng-ho.org>
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To: Gregory Orange <gregory.orange@calorieking.com>,
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Subject: Re: CURRENT: Intel Haswell KMS support?
References: <20141231203011.51831755.ohartman@zedat.fu-berlin.de>
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On 05/01/2015 02:33, Gregory Orange wrote:
> Hi Arthur,
>
> On 01/01/15 19:19, Arthur Chance wrote:
>> This is being written on a machine with an Intel i7-4790K CPU (Devil's
>> Canyon, i.e. Haswell) and a Dell U2711 2560x1440 monitor. The X VESA
>> driver works fine for me at native resolution. OK, I'm not a gamer and I
>> don't do anything that needs fast 3D, but it works well enough that my
>> first thought after reading the original post was "Haswell graphics
>> aren't supported???" because I'd completely forgotten I was using the
>> VESA driver. Using a vt console rather than sc I have no problem
>> dropping out of X back into console mode either.
>
> I think this is the problem I'm facing - can you clarify and assist if
> possible? I have a Haswell i3 which runs X fine with vesa, but when I
> quit X, the machine crashes hard and requires holding the power button.

The problem with sc and the new X system is that on return from X to 
console mode the sc driver can't regain control of the screen to display 
anything. It doesn't crash, but you get a black screen so you might 
think it's not responding. In fact, if you (carefully) type "shutdown -r 
now" (or any other command) it will respond. If that's what's happening, 
switching to the vt driver will help. If you're genuinely getting a 
crash though it's not an sc versus vt problem.

To use the vt driver on my system I have the following two lines in 
/boot/loader.conf

kern.vty=vt
i915kms_load="YES"

Try that (and reboot of course) and see what happens.

-- 
Those who do not learn from computing history are doomed to
GOTO 1



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