[yocto] SATO on Intel DN2800MT

[r10kindsofpeople]

On Thu, May 8, 2014 at 3:43 PM, Chris Tapp <opensource at keylevel.com> wrote:

> On 8 May 2014, at 18:52, r10kindsofpeople <r10kindsofpeople at gmail.com>
> wrote:
>
> > On Thu, May 8, 2014 at 12:39 PM, Chris Tapp <opensource at keylevel.com>
> wrote:
> > Hi John,
> >
> > On 8 May 2014, at 16:25, r10kindsofpeople <r10kindsofpeople at gmail.com>
> wrote:
> >
> > > I'm trying to experiment with the SATO build on a DN2800MT with a VGA
> monitor, but can't seem to get going.  The binaries from Daisy and
> genericX86 get as far as the Yocto progress bar complete, and then go
> black.  Any quick hints?
> >
> > Have a look in the README file for the cedartrail BSP. At the bottom you
> will find:
> >
> > Work Around for VGA and LVDS Display issue in PVR driver
> > --------------------------------------------------------
> >
> > The PVR driver has a issue that for some systems it causes
> > it to incorrectly assume that a LVDS display is connected
> > while infact a VGA display is connected and Vice Versa.
> > If your VGA or LVDS display does not work with
> > "cedartrail" MACHINE, then if you have connected a VGA display,
> > add the following to the kernel command line:
> >
> > video=LVDS-1:d video=VGA-1:e
> >
> > <snip>
> >
> > I suspect it's this. Watch out if you use HDMI as well - the VGA fix
> seems to break HDMI. On my systems the VGA then works, but the HDMI pauses
> a lot running the same image! I think you can use similar magic for HDMI
> (or did I just take it out?).
> >
> > > I note also that genericX86 looks like a complete Yocto tree rather
> than just BSP layers.  Am I right, and are there hints on how to combine
> this with a generic Daisy tree for other processors/projects?
> > >
> > >
> Yocto_11_0_0/genericx86-daisy-11.0.0/meta-yocto-bsp/recipes-graphics/xorg-xserver/xserver-xf86-config/genericx86/xorg.conf
> is a zero length file.   ?
> > >
> > > John
> > > --
> > > _______________________________________________
> > > yocto mailing list
> > > yocto at yoctoproject.org
> > > https://lists.yoctoproject.org/listinfo/yocto
> >
> > Chris Tapp
> >
> > opensource at keylevel.com
> > www.keylevel.com
> >
> >
> >
> > Chris,
> >
> > Thanks!  What version Yocto are you using?  I ask because you suggest I
> check the README file for the cedartrail BSP, but I've been unable to FIND
> a cedartrail BSP in anything newer than Denzil, and that only by searching
> the git trees.  genericX86 is said to cover cedartrail, but it does seem,
> well, generic, with nothing particularly specific to cedartrail, and much
> more than what I'm used to in a Yocto BSP.
>
> I'm using 'danny' as that's the latest version which includes video
> hardware acceleration for the DN2800.
>
> >   At any rate, I'll try what you suggest in terms of the kernel command
> line.
>
> The README says this fixes the issue for the PVR drivers, but I don't
> think they're included in later versions.
>
> If you've still got problems, it may be worth posting to the meta-intel
> mailing list as well as that's where Intel BSPs are discussed.
>
> > Thanks again,
> >
> > John
>
> Chris Tapp
>
> opensource at keylevel.com
> www.keylevel.com
>
>
>
>
For what it's worth, it seems to do the trick with Daisy.

In local.conf
APPEND_genericx86 = "video=LVDS-1:d video=VGA-1:e"

THANKS!

John
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