Dear Tapan, I see in your mail three different aspects: 1/ "Intel 537EP card found" in dmesg. This sounds good and tells the driver is correctly installed and recognized your modem as a 537EP modem. 2/ "serial8250: too much work for irq21" in dmesg. The is another driver outputting this. From: http://ubuntuforums.org/showthread.php?t=28025 this would suggest not starting ppp on a ttySx terminal. >QUOTE> Re: Serial8250: Too much work for IRQ11 ________________________________________________________________________ On my laptop, I get the same message. I found that by killing the ppp session on ttyS0, the problem goes away. Now I just need the find where this ppp session is started? Where is inittab? >/QUOTE> If the solution comes from not starting ppp you may edit your /etc/inittab to prevent ppp from starting, using the Serial8250 device. 3/"efax: 34:13 Error: can't open serial port /dev/537ep: Bad address" Perform the following commands: $ ls -l /dev/modem You should read it points to /dev/537ep device $ ls /dev/537* You should read /dev/537ep and /dev/537ep0 Your efax command you should like: $ efax -vewinchmart This automatically opens up /dev/modem. Note that you do not have to specify a device and /dev/modem is the default. Yours sincerely, - http://vouters.dyndns.org:8080/ Philippe Vouters (Fontainebleau/France) Le mercredi 17 juin 2009 à 22:35 +0530, Tapan Chugh a écrit : > Philippe Vouters wrote: > > Should I say Dear Tapan or Dear Chugh ? What is your given name ? > > > > >From my makefile_537 Makefile script, here is what I can read: > > intel-536-537/makefile_537: vendor_device_ids[3]="1543:3052";\ > > > > Entering the following commands: > > [philippe@victor ~]$ grep "3052" intel-536-537/coredrv/*.h > > intel-536-537/coredrv/hamcore.h: #define NEW_SI3052_VENDOR_ID > > 0x1543 > > intel-536-537/coredrv/hamcore.h: #define NEW_SI3052_DEVICE_ID > > 0x3052 > > intel-536-537/coredrv/hamcore.h: #define SI3052_VENDOR_ID 0x8086 > > intel-536-537/coredrv/hamcore.h: #define SI3052_DEVICE_ID 0x1080 > > intel-536-537/coredrv/hamcore.h: #define MDM_PCI_DEVICE_ID 0x3052 > > [philippe@victor ~]$ grep "1543" intel-536-537/coredrv/*.h > > intel-536-537/coredrv/hamcore.h: #define NEW_SI3052_VENDOR_ID > > 0x1543 > > > > So your phone modem should be recognized as being a Silicon phone modem > > board by the Intel 537 driver. > > > > I suggest you to go to http://vouters.dyndns.org:8080/Intel site and > > download the latest driver. You should $ tar -jxvf the downloaded > > driver. Use efax and dmesg to troubleshoot it. > > > > You need to install kernel headers and devel packages prior to build the > > driver. > > > > Yours sincerely, > > - > > http://vouters.dyndns.org:8080/ > > Philippe Vouters (Fontainebleau/France) > > > > > > Le mercredi 17 juin 2009 à 08:49 +0200, Marvin Stodolsky a écrit : > > > >> Tapan, > >> > >> Sadly, Linux support has not yet been achieved for > >> 1543:3052 SILICON Laboratories Intel 537 [Winmodem] > >> though Philippe may guide you in some expreiments > >> > >> MarvS > >> > >> On Tue, Jun 16, 2009 at 12:10 PM, Tapan Chugh<chugh.tapan@xxxxxxxxx> wrote: > >> > >>> > > > > > > > Dear Philippe, > Thanks for helping me. I followed your instructions and installed the > intel 537. However when i try to test it using efax i get an error message > > efax: Wed Jun 17 22:34:13 2009 efax v 0.9a-001114 Copyright 1999 Ed Casas > efax: Wed Jun 17 22:34:13 2009 efax v 0.9a-001114 Copyright 1999 Ed Casas > efax: 34:13 compiled Oct 24 2008 10:36:30 > efax: 34:13 Error: can't open serial port /dev/537ep: Bad address > efax: 34:13 done, returning 2 (unrecoverable error) > > > also i have pasted the part of dmesg log > > Intel 537EP card found > serial8250: too much work for irq21 > serial8250: too much work for irq21 > serial8250: too much work for irq21 > serial8250: too much work for irq21 > serial8250: too much work for irq21 > serial8250: too much work for irq21 > Unknown device, exiting > Unknown device, exiting > Unknown device, exiting > Unknown device, exiting > Unknown device, exiting > Unknown device, exiting > Unknown device, exiting > serial8250: too much work for irq21 > serial8250: too much work for irq21 > serial8250: too much work for irq21 > serial8250: too much work for irq21 > Unknown device, exiting > > >