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Date:      Thu, 29 Jan 2015 23:56:13 +0100
From:      "O. Hartmann" <ohartman@zedat.fu-berlin.de>
To:        NGie Cooper <yaneurabeya@gmail.com>
Cc:        FreeBSD CURRENT <freebsd-current@freebsd.org>
Subject:   Re: i915kms.ko: when loaded with Haswell HD4600, display goes blank
Message-ID:  <20150129235613.6abe495a.ohartman@zedat.fu-berlin.de>
In-Reply-To: <CAGHfRMAO%2BrJZrAOP1tc-Ks9VO8T87CdjNj4OKEi=bOeUhWUJAA@mail.gmail.com>
References:  <20150129195230.5dd7078f.ohartman@zedat.fu-berlin.de> <CAGHfRMCQ12MNeg%2Bopc_-RkrUHwMimB29rUPHQ5nP9YAR7DTOtg@mail.gmail.com> <CAGHfRMAO%2BrJZrAOP1tc-Ks9VO8T87CdjNj4OKEi=bOeUhWUJAA@mail.gmail.com>

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Am Thu, 29 Jan 2015 11:19:38 -0800
NGie Cooper <yaneurabeya@gmail.com> schrieb:

> On Thu, Jan 29, 2015 at 11:18 AM, NGie Cooper <yaneurabeya@gmail.com> wro=
te:
> > On Thu, Jan 29, 2015 at 10:52 AM, O. Hartmann
> > <ohartman@zedat.fu-berlin.de> wrote:
> >>
> >> Having trouble with loading i915kms.ko on a Haswell-based Lenovo Think=
Pad E540. The
> >> laptop is equippted with a Intel i5-4200M CPU with integrated HD4600 i=
GPU. Recent
> >> update of CURRENT and loading of i915kms.ko turns the display immediat=
ely blank.
> >> Laptop is accessible via ssh and network. Only display is dead.
> >>
> >> I suppose this a bug?
> >
> > Yes, very much so. What's your svn revision and can you please create
> > a bug for this issue?
>=20
> Please also read the thread titled "drm2 regression: backlight
> adjustment on ivybridge no longer works" first to see if the symptoms
> describe there match your's.


That is useless, since the reported symptomes do not apply to non-working H=
aswell.

Since the last update of the OS - today, CURRENT 277900, the high res conso=
le is gone and
has fallen back to the 800x600 pixel. The same with the X11 server's displa=
y resolution.
I can not use VESA driver on the Lenovo ThinkPad E540 with i5-4200M, since =
it doesn't
startup. I have to use  xf86-video-scfb which is a pain in the ass.

An alternative is to use Ubuntu on the Lenovo E540 and L540 we purchased.

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