xorg-devel Digest, Vol 27, Issue 41

[Dushara Jayasinghe]

  On 12/04/2011 11:06 AM, xorg-devel-request at lists.x.org wrote:
> Date: Mon, 11 Apr 2011 21:55:27 +0200
> From: Abdoulaye Walsimou GAYE<awg at embtoolkit.org>
> Subject: Re: Xfbdev fails with "no screens found"
> To: xorg-devel at lists.x.org
> Message-ID:<4DA35CAF.1090708 at embtoolkit.org>
> Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
>
> On 04/11/2011 10:01 AM, Dushara Jayasinghe wrote:
>> Hi all,
>>
>> I'm trying to use Xfbdev on an embedded linux device with a monochrom LCD display. However, the command returns the following error:
>>
>> Fatal server error:
>> no screens found
>>
>> Using xserver_xorg-server-1.7.5
>> with kdrive/fbdev
> Hello,
> does the following command line, before starting Xfbdev, fixes the issue:
> export DISPLAY=:0
>
-- 

Hi Thanks for the reply.

No that wasn't the issue. To cut a long story short... I needed to 
update some stuff on buildroot.

However, it's still not working properly. I had to add the attached 
patch to get it to work with the frame buffer device I'm using. Xfbdev 
runs fine now but when I execute xlogo, nothing is displayed on the 
screen. The part of the screen gets 'cleared' so I know that it writes 
*something* to /dev/fb0.

The output of fbset -i:

# fbset -i

mode "240x128-158"
# D: 5.000 MHz, H: 20.325 kHz, V: 157.560 Hz
geometry 240 128 240 128 1
timings 200000 3 1 0 0 2 1
rgba 0/0,0/0,0/0,0/0
endmode

Frame buffer device information:
Name : DISP0 BG
Address : 0x906b8000
Size : 4096
Type : PACKED PIXELS
Visual : MONO01
XPanStep : 1
YPanStep : 1
YWrapStep : 0
LineLength : 32
Accelerator : No
#

Any ideas on what I need to get it going?

P.S. Not sure if any changes to the linux frame buffer driver are 
required e.g. is the rgba field in the mode section ok?

Thanks.
Dushara

Dushara Jayasinghe | Senior Software Engineer
dushara.jayasinghe at hydrix.com | +61 3 8573 5221
Hydrix: /Our Expertise – Your Competitive Advantage/
www.hydrix.com | fax +61 3 9572 2686 | phone +61 3 8573 5299

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