Dear Tapan, 04:00.0 Modem: SILICON Laboratories Intel 537 [Winmodem] (rev 04) (prog-if 00 [Generic]) Subsystem: SILICON Laboratories Device 3000 Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping+ SERR- FastB2B+ DisINTx- Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 32 (250ns min, 15500ns max), Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 21 Region 0: Memory at 50001000 (32-bit, non-prefetchable) [size=4K] Region 1: I/O ports at 1000 [size=256] Capabilities: [80] Power Management version 2 Flags: PMEClk- DSI- D1- D2- AuxCurrent=55mA PME(D0 +,D1-,D2-,D3hot+,D3cold+) Status: D0 PME-Enable- DSel=0 DScale=0 PME- Kernel driver in use: serial edit /etc/modprobe.d/blacklist and blacklist the serial driver. Then reboot. Regards, - http://vouters.dyndns.org:8080/ Philippe Vouters (Fontainebleau/France)