echo 100 icmp_route >> /etc/iproute2/rt_tables
ip rule add fwmark 1 table icmp_route
ip route add default via IP_OF_NOT_DEFAULT_GATEWAY dev eth0 table icmp_route
iptables -t mangle -A OUTPUT -d IP_TO_PING -p icmp -j MARK --set-mark 1
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My testprog do a lot of bitbang - after hours i got following warning and my machine lockups:
WARNING: at /build/buildd/linux-2.6.38/lib/kref.c:34
After debugging uss720 driver i discovered that the completion callback was called before usb_submit_urb returns.
The callback frees the request structure that is krefed on return by usb_submit_urb.
--- a/drivers/usb/misc/uss720.c
+++ b/drivers/usb/misc/uss720.c
@@ -177,12 +177,11 @@ static struct uss720_async_request *submit_async_request(...
spin_lock_irqsave(&priv->asynclock, flags);
list_add_tail(&rq->asynclist, &priv->asynclist);
spin_unlock_irqrestore(&priv->asynclock, flags);
+ kref_get(&rq->ref_count);
ret = usb_submit_urb(rq->urb, mem_flags);
- if (!ret) {
- kref_get(&rq->ref_count);
+ if (!ret)
return rq;
- }
- kref_put(&rq->ref_count, destroy_async);
+ destroy_async(&rq->ref_count);
err("submit_async_request submit_urb failed with %d", ret);
return NULL;
}
http://git.kernel.org/?p=linux/kernel/g ... 5b45be8688
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sudo apt-get install kexec-tools
change LOAD_KEXEC to true in /etc/default/kexec
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First activate and rise webcam audio input level with alsamixer.
ffmpeg -f video4linux2 -i /dev/video0 -pix_fmt yuv420p -s vga -r 8 -f alsa -ac 1 -ar 16000 -i hw:1,0 -vcodec mpeg4 -b 400k -acodec libmp3lame -ab 80k video.avi
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I got a funny viennese dialect keyboard, but after start using it i missed a key '<,>,|'
So i searched for a way to remap 'AltGr + y' to '|', 'AltGr + ,' to '<' and 'AltGr + .' to '>'
Console
evaluate the key to change with
#> sudo showkey -s
press the key
here y is 0x2c = 44
here , is 0x33 = 51
here . is 0x34 = 52
test remap with
echo "altgr keycode 44 = bar" | loadkeys
bar is a symbolic name i found at German-Howto
Finally i extended /etc/rc.local with
LOADKEYS=$(which loadkeys)
if [ -x $LOADKEYS ]; then
cat << EOT | $LOADKEYS
altgr keycode 44 = bar
altgr keycode 51 = less
altgr keycode 52 = greater
EOT
unset LOADKEYS
fi
Xorg
evaluate the key to change with
#> xev
press the key
here y is keycode 52
here , is keycode 59
here . is keycode 60
test remap with
xmodmap -e "keycode 52 = y Y y Y bar"
dump keys with
#> xmodmap -pke > ~/.Xmodmap
remove all lines except lines starting with desired keycodes to change.
my ~/.Xmodmap now looks like
keycode 52 = y Y y Y bar U203A guillemotright
keycode 59 = comma semicolon comma semicolon less multiply periodcentered
keycode 60 = period colon period colon greater division U2026
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