[yocto] [PATCH 2/6] crownbay: customize the xorg.conf for the flat panel on the corwnbay kit

[Kamble, Nitin A]

> -----Original Message-----
> From: yocto-bounces at yoctoproject.org [mailto:yocto-
> bounces at yoctoproject.org] On Behalf Of Kamble, Nitin A
> Sent: Friday, July 27, 2012 11:02 AM
> To: Darren Hart
> Cc: yocto at yoctoproject.org
> Subject: Re: [yocto] [PATCH 2/6] crownbay: customize the xorg.conf for the
> flat panel on the corwnbay kit
> 
> > >> On 07/23/2012 03:06 AM, nitin.a.kamble at intel.com wrote:
> > >>> From: Nitin A Kamble <nitin.a.kamble at intel.com>
> > >>>
> > >>> The kit has Auo 800x600 LCD screen. Configuring Xorg for it.
> > >>
> > >> I presume the crownbay has additional display options? how does
> > >> this impact those?
> > >>
> > > This change sets the resolution of the screen to 800x600. And this
> > > is applicable to LCD screen on the kit as well as external monitor.
> > >   I will add a note about it in the log.
> >
> > I presume that without this change it was able to detect the
> > appropriate resolution of the connected monitor, but not of the LCD?
> >
> > If so, this change effectively breaks that autodetection and forces
> > everything to the 800x600 display which is arguably very
> > low-resolution by today's standards. Why should this be the default?
> > When you refer to "the kit", what exactly are you referring to?
> >
> > Also, is this a discussion you have already had with Tom? I don't want
> > to contradict what he has said regarding this BSP.
> 
> 
> EMGD driver on crownbay gives few resolutions as options. By default it tries
> to set 1366x768 resolution for both LCD and external monitor.
> The Crownbay kit is a suitcase kind of box, which has builtin LCD screen of
> resolution 800x600. This LCD screen shows only 800x600 of the default
> 1366x768 area. So The LCD is not able to show all the screen, and IMO it is a
> functional issue.
> 
> For my Dell 1704FPTi monitor which has 1280x1024 native resolution; When
> connected to the crownbay,  X cannot find a working mode for this monitor.
> But if I set 800x600 in the xorg.conf as this commit does, then both LCD &
> external monitor can show the X screen without any issues.
> 
> I guess if a 1366x768 resolution monitor is connected to crownbay, it will
> show the X screen fine, but I don't have such monitor now. And also I think a
> BSP should not have such resolution requirement for the attached monitor,
> and attached LCD screen of the kit work without issues.
> 
> So the point of this commit is, make default config such that it will work for
> the LCD screen on the kit as well as any monitor attached. And if someone
> wants to get better resolution with their external monitor then they need to
> adjust the xorg.conf accordingly.
> 
> BTW I did not have much discussion with Tom on this topic.
> 

Correction: the Dell 1704FPTi monitor can work with 1280x1024 resolution with crownbay, only if I specify the HorizSync and VertRefresh & resolution mode parameters for monitor in the xorg.conf

Nitin