Ludwig, Try editing your /etc/wvdial.conf file and change Init 2 as follows: sample Init 2 line: Modem = /dev/ttySL0 Baud = 460800 Init = ATZ Init2 = ATQ0 V1 E1 S0=0 X3 &C1 &D2 +MS90 ISDN = 0 Modem Type = Analog Modem Phone = YOUR_ISP_PHONE_NUMBER_GOES_HERE Username = YOUR_USERNAME Password = YOUR_PASSWORD Carrier Check = no Stupid Mode = yes Try that and report back. Regards, Antonio On Sun, Aug 14, 2011 at 12:08 PM, Ludwig Gebauer <ludwiggebauer@xxxxxxx> wrote: > Marvin, > > thank you very much. > > Now the modem shows some reaction, but no real success: Wvdial exits with a happy "NO DIALTONE". A shot dip in phone line voltage indicates, that the modem picks up the phone, but immediately hangs it up again, before any telephone provider might have a chance to send a dialtone. The hardware seems o.k.; I am posting via the same hardware and phone line under SuSE 10.3. > > Fiddling with drivers (Removing oss-drivers, inserting available snd_intel_*-drivers) and wvdial.conf settings (Reduced baudrate, dial without waiting for dialtone, etc.) brought no change. > > Suspicious: > > linux-k7za:~ # slmodemd -c GERMANY --alsa hw:0,6 > SmartLink Soft Modem: version 2.9.11 Aug 9 2011 14:15:04 > symbolic link `/dev/ttySL0' -> `/dev/pts/2' created. > modem `hw:0,6' created. TTY is `/dev/pts/2' > error: sched_setscheduler: Operation not permitted > Use `/dev/ttySL0' as modem device, Ctrl+C for termination. > > Whitch Operation?? I suspected a priority problem, invoced slmodend with nice -20, but no change. > > Also suspicious: > > linux-k7za:~ # dmesg > . > . > [ 536.642852] hda-intel: IRQ timing workaround is activated for card #0. Suggest a bigger bdl_pos_adj. > > Regards > Ludwig