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Home > Archive > Linux Debian support > September 2005 > /dev, kernels and working hardware
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/dev, kernels and working hardware
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I have a problem with my Debian desktop installation. It is running sarge
and has all udev, sysfs, discover, hotplug and dbus. Normally I use a
2.6.8 kernel compiled from Debian sources, but I recently compiled 2.6.13
vanilla. Both of these have a problem: certain device files are missing.
Example: /dev/lp0 does not exist. parport and lp are compiled as modules
but the device files don't magically appear when I insert the modules.
This is the output of "mount" (with regular file systems stripped)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
usbfs on /proc/bus/usb type usbfs (rw,devmode=0666)
tmpfs on /dev type tmpfs (rw,size=10M,mode=0755)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
Also, on the 2.6.13 kernel, my digital camera refuses to work. It shows up
in the output of lsusb, but digikam reports "Failed to connect to camera.
Please make sure its connected properly and turned on. Would you like to
try again?". The camera works perfectly on the 2.6.8 kernel. To compile
this kernel, I extracted the sources, copied the config file of my 2.6.8
kernel, ran "make oldconfig" over it (and just took the defaults at
every question) and used make-kpkg to build, package and install the
kernel as I always do.
I find the non-existence of /dev/lp0 weird and I suspect udev is the
problem, but I don't have much clue about where to look for solutions.
Besides, udev is running with the Debian-standard configuration.
--
Frank Van Damme
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