I believe there are at least three ways to install the realtime module:
unpack realtime-lsm.tar.bz2 and follow the instructions in INSTALL, use module-assistant, or use make-kpkg --added_modules realtime kernel_image
I have tried all of these and combinations of them, twice with success but most often not. I always get realtime.ko in /lib/modules/2.6.8/extra but then /etc/init.d/realtime start responds "Loading Realtime Linux Security Module: not found" and modprobe realtime exits with the message "FATAL: Error inserting realtime (/lib/modules/2.6.8/extra/realtime.ko): Invalid arguement."
Unfortunately, I can't pin down exactly which sequence of instructions worked as I was trying at the same time to get the USB dvdrw drive set up. On several tries I purged all the realtime entries in dpkg -l and deleted the realtime files and the module directory in /usr/src and started fresh. I noticed that module-assistant creates backups of /usr/src/linux. I have unpacked the kernel source in /usr/src/kernel-source-2.6.8 and never touch /usr/src/linux.
Logically, I believe that unpacking realtime-lsm.tar.bz2 and following the INSTALL directions including setting KERNEL_DIR := / usr/src/kernel-source-2.6.8 in Makefile should be a straightforward method of installing the realtime module but this results in the modprobe invalid arguement response.
I'll keep trying until I reproduce the sequence that works. I am posting this message in case someone knows the correct method and has time to post it.
As to the USB problem Z. A. Kaleta responded that CONFIG_BKL_DEV_UB must be set to "n". This may be so but I can find no such option in make menuconfig. I know the device is working - lsusb finds it and less /proc/bus/usb/devices lists it as a 400 speed device. Hotplug allows it to be disconnected and reconnected with no problems but if I try to use it I get a message that special device /dev/sr1 does not exist. If I boot to my backup 2.4.26 kernel /dev/sr1 does exist. I have tried cd /dev; ./MAKEDEV -n sr which seems to work but then ls /dev shows no such devices. Cyprien suggested looking in /var/log/syslog which I have done. It shows the dvdrw device being installed but gives no indication of a mount point. I googled the recent archives and read the messages regarding mounting a usb harddisk without finding any solution. Clearly something elementary is missing from my setup - if I hotplug usb devices while running the 2.4.26 kernel the response includes the mount point but this is not the case when using the 2.6.8 kernel. Again, I'll persevere until I solve this riddle.
Tom George
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