On 07/30/2012 02:50 AM, Kamble, Nitin A wrote: > > >> -----Original Message----- From: Darren Hart >> [mailto:dvh...@linux.intel.com] Sent: Saturday, July 28, 2012 3:27 >> AM To: Kamble, Nitin A Cc: yocto@yoctoproject.org; >> bruce.ashfi...@windriver.com; Zanussi, Tom Subject: Re: [yocto] >> [PATCH 2/6] crownbay: customize the xorg.conf for the flat panel on >> the corwnbay kit >> >> >> >> On 07/26/2012 10:31 PM, Kamble, Nitin A wrote: >>>>>> On 07/23/2012 03:06 AM, nitin.a.kam...@intel.com wrote: >>>>>>> From: Nitin A Kamble <nitin.a.kam...@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. >> >> This seems like a bug to me. The driver should be able to probe the >> display and use the optimal resolution without it being specified >> in the Xorg.conf. So far as I know we don't specify resolution in >> any of the meta-intel BSPs: >> >> dvhart@envy:~/source/poky/layers/meta-intel [denzil] $ find . >> -name xorg.conf | xargs grep -i Modes >> >> So while I agree the kit screen should work out of the box, the >> fact that even your dell lcd monitor doesn't work is cause for >> concern. Is there anything in the Xorg log that indicates why it >> isn't able to get the EDID data? >> >> -- Darren >> > > In the xorg log I do not see any useful EDID information. Either > these displays do not support EDID, or the EDID support in the EMGD > driver is not working well with these devices. And the EMGD driver is > closed source. So we can't fix it. So IMO keeping the resolution to > 800x600 is the best possible solution for crownbay BSP.
Tom, I've never booted a crownbay machine. What has your experience been with the displays on this board? -- Darren Hart Intel Open Source Technology Center Yocto Project - Technical Lead - Linux Kernel _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto