Re: Intel Haswell support - Any updates?

From: Nikola Pajkovsky <>
Date: Thu, 17 Sep 2015 17:43:02 +0200
Kris Moore <> writes:

> On 09/17/2015 11:19, O. Hartmann wrote:
>> Am Thu, 17 Sep 2015 11:02:07 -0400
>> Kris Moore <> schrieb:
>>> On 09/17/2015 09:48, Matthias Apitz wrote:
>>>> El día Thursday, September 17, 2015 a las 10:41:43PM +0900, Lundberg, Johannes
>>>> escribió:
>>>>> Same here. I would personally definitely buy new hardware from Intel if
>>>>> FreeBSD worked on it (not vesa...)
>>>>> ...
>>>> What dow you have against vesa? I run CURRENT on some Acer C720
>>>> Chromebooks with Haswell chipset in Vesa mode. And you will not note it.
>>>> I have never ever had such a fast desktop (KDE4) before. I can live fine
>>>> with Vesa until Haswell suport is there.
>>>> 	matthias
>>> BTW, have you tried the xf86-video-scfb driver? It works much better
>>> than vesa here. The only catch is you have to be booted UEFI with CSM
>>> disabled. Using it on my X1 Carbon, gets 3k resolution properly and
>>> everything. Thanks to Glen Barber for bringing that to my attention.
>> Running that specific driver on several Lenovo HD4600 driven models gives me headaches
>> and more. This software-framebuffer works - yes, on whatever resolution you might wish,
>> but it consumes CPU time. That said, I recall that the display was jumpy, slow and
>> unresponsive when used under heavy load - not even 3k resolution, but with a moderate
>> lowend of 1980x1080.
> Interesting, that's been the opposite of my experience here. Vesa was
> much slower / using more CPU time and didn't give me the native
> resolution. Switching to scfb made the laptop "usable" for me, at least
> until we get a proper Intel driver that does Broadwell.

Use memcontrol to set mtrr write-combine for your Vesa. Vesa is lightning
fast on T440p on 1920x1200.

Received on Thu Sep 17 2015 - 13:43:06 UTC

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