Package: fbgrab
Version: 1.0.0-4
Severity: important
I use framebuffer console and I want to take a screenshot with fbgrab. But the
it gives me garbase image.
In any tty
$ fbgrab fb.png
or
$ fbgrab -w 1440 -h 900 -b 32 fb.png
or
$ cp /dev/fb0 fb.dump
$ fbgrab -w 1440 -h 900 -b 32 -f fb.dump fb.png
all produce garbage image.
After looking into fbgrab.c, I find it reads /dev/fb0 into buffer and treats
the width of the buffer as fb_varinfo.xres. This is incorrect since I have
xres_virtual larger than xres then fbgrab uses a wrong line_length.
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.26-2-686 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages fbgrab depends on:
ii libc6 2.9-4 GNU C Library: Shared libraries
ii libpng12-0 1.2.35-1 PNG library - runtime
fbgrab recommends no packages.
fbgrab suggests no packages.
-- no debconf information
my framebuffer driver is nvidiafb with param:
video=nvidiafb,mode_options:1440x900,bpp:32,hwcur:1
framebuffer mode:
$ fbset -v -i
Linux Frame Buffer Device Configuration Version 2.1 (23/06/1999)
(C) Copyright 1995-1999 by Geert Uytterhoeven
Opening frame buffer device `/dev/fb0'
Using current video mode from `/dev/fb0'
mode "1440x900-60"
# D: 106.508 MHz, H: 55.939 kHz, V: 59.892 Hz
geometry 1440 900 1472 11300 32
timings 9389 232 80 25 3 152 6
hsync high
accel true
rgba 8/16,8/8,8/0,8/24
endmode
Getting further frame buffer information
Frame buffer device information:
Name : NV39
Address : 0xe0000000
Size : 268435456
Type : PACKED PIXELS
Visual : DIRECTCOLOR
XPanStep : 8
YPanStep : 1
YWrapStep : 0
LineLength : 5888
MMIO Address: 0xf4000000
MMIO Size : 16777216
Accelerator : nVidia Arch 40
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