MTD 248-645A Bedienungsanleitung PDF herunterladen (Seite 225)

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Linux From Scratch - Version 7.0

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For each of your devices that is likely to have this problem (even if the problem doesn't exist in your current Linux

distribution), find the corresponding directory under /sys/class or /sys/block. For video devices, this may

be /sys/class/video4linux/videoX. Figure out the attributes that identify the device uniquely (usually,

vendor and product IDs and/or serial numbers work):

udevadm info -a -p /sys/class/video4linux/video0

Then write rules that create the symlinks, e.g.:

cat > /etc/udev/rules.d/83-duplicate_devs.rules << "EOF"

# Persistent symlinks for webcam and tuner

KERNEL=="video*", ATTRS{idProduct}=="1910", ATTRS{idVendor}=="0d81", \

SYMLINK+="webcam"

KERNEL=="video*", ATTRS{device}=="0x036f", ATTRS{vendor}=="0x109e", \

SYMLINK+="tvtuner"

EOF

The result is that /dev/video0 and /dev/video1 devices still refer randomly to the tuner and the web camera

(and thus should never be used directly), but there are symlinks /dev/tvtuner and /dev/webcam that always

point to the correct device.

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