Hi all,
This is essentially a repost of
(http://lists.x.org/archives/xorg-devel/2011-April/021370.html) with the
problem (hopefully) more clearly explained.
I need to use Xfbdev in xorg server 1.7.5 for an embedded device with a
240x128 monochrome display. I have tweaked an existing kernel FB driver.
The FB config is:
# 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 : 0x908e8000
Size : 4096
Type : PACKED PIXELS
Visual : MONO01
XPanStep : 1
YPanStep : 1
YWrapStep : 0
LineLength : 32
Accelerator : No
The Visual setting is one of the changes I have made.
The FB driver itself works as expected when I run:
# cat 4k_image_file > /dev/fb0
Initially I couldn't even start Xfbdev until I applied this
(http://lists.x.org/archives/xorg-devel/attachments/20110414/c15d2fb7/attachment.asc)
patch.
Now Xfbdev starts without a problem (it spits out the following few
lines to the console):
# Xfbdev
294:depth=1, bpp=1
KdSetPixmapFormats:1166 bpp[0] = 1
KdSetPixmapFormats:1172: Got here
[dix] Could not init font path element /usr/share/fonts/X11//TTF/,
removing from list!
[dix] Could not init font path element /usr/share/fonts/X11//OTF,
removing from list!
[dix] Could not init font path element /usr/share/fonts/X11//Type1/,
removing from list!
The issue is, when I run a test app (xlogo in this case), nothing is
displayed on the screen.
I also ran the following test (while Xfbdev is running):
# cat image_with_all_pixes_set >/dev/fb0
# xlogo
When I ran xlogo, the pixels in one rectangular section of the display
were turned off. So it looks like X is accessing the display buffer
correctly, but somehow looses the pixel depth info.
Can anyone give any hints on getting it to work properly?
Thank you
Dushara
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