Philippe Vouters wrote: > Dear Tapan, > > In /etc/modprobe.d/blacklist, my belief is that you should enter a line > like: > blacklist serial_cs > Refer to $ lsmod to know the correct driver name. > Regards, > - > http://vouters.dyndns.org:8080/ > Philippe Vouters (Fontainebleau/France) > > > > > Dear Philippe, As you said i blacklisted the serial_cs module and rebooted. However the lspci -vvv still shows serial as the driver in use. Also i added the -DDEBUG_LINUX to the makefile. Here is the part of the dmesg log when i try to execute efax - softserial:softserial_open() softserial_open:caller efax[3420] Unknown device, exiting softcore:open: modem_init failed. Returning -1 softserial:softserial_close() softserial_close:caller efax[3420] And here is the part of the /var/log/messages/ Jun 18 18:04:22 localhost kernel: softserial:softserial_open() Jun 18 18:04:22 localhost kernel: softserial_open:caller efax[3614] Jun 18 18:04:22 localhost kernel: Unknown device, exiting Jun 18 18:04:22 localhost kernel: softcore:open: modem_init failed. Returning -1 Jun 18 18:04:22 localhost kernel: softserial:softserial_close() Jun 18 18:04:22 localhost kernel: softserial_close:caller efax[3614]