hi, if i'm not mistaken whenever u slot in an internal modem as either com 3/4 u'll have to disable also either com1/2. Take a look at the serial howto. The Postman <[EMAIL PROTECTED]> on 08/20/99 02:07:16 AM Please respond to [EMAIL PROTECTED] To: [EMAIL PROTECTED] cc: (bcc: Hamka B Hj Suleiman/SKO/PCSB/Petronas) Subject: [newbie] Linux compatible Modem and sound card WILL NOT work under Linux. Why??? My modem and sound card WILL NOT work in Linux. I have reset the bios which made everything get new IRQ addresses and such. But that just don't seem to work. I still can NOT get Linux-Mandrake fully installed. I can not seem to get the modem working after setting up the sound card. I just don't understand it. The modem works very good untill the sound card is configured under SETUP. Once the sound card is setup. The modem seems to get less dominant and stops working. Here is what I get when I type "isapnp /etc/isapnp.conf" ........ [root@localhost /root]# isapnp /etc/isapnp.conf Board 1 has Identity 53 00 1e 1a 58 28 00 8c 0e: CTL0028 Serial No 1972824 [checksum 53] Board 2 has Identity 8b d2 b1 bd ab 31 30 72 56: USR3031 Serial No 3534863787 [checksum 8b] /etc/isapnp.conf:46 -- Fatal - resource conflict allocating IRQ5 (see /proc/interrupts) /etc/isapnp.conf:46 -- Fatal - Error occurred executing request 'IRQ 5' --- further action aborted [root@localhost /root]# One of the errors say "see /proc/interrupts". Well, the /proc/interrupts file is size zero and contains no data. Now what? My BIOS says that my modem is at IRQ 11 on COM 3 (ttyS2). Well, when I boot the computer, Linux puts out a line durring bootup that says... ttyS2 at 0X3E8 (IRQ=4) is a 16550A I don't understand how this can be possible. How can the Linux operating system see the modem at "IRQ 4" when the bios says it is at IRQ 11. The settings in Windows 98 even say that the modem is operating at IRQ 11. The bios also says that the sound card is set to operate at IRQ 5. So how could there be a resource conflict? If there is a resource conflict, why doesn't it get reported when I run Windows 98? Windows 98 says that the sound card is running on IRQ 5. That jives exactly with the bios. Windows 98 runs VERY smooth. LINUX is like a rough and rocky road. Is Linux-Mandrake 6.0 trying to invent its own bios and environment? What MUST I do to fix this mess? What information can I provide to help fix this thing? I am writing to MandrakeSoft and they are VERY slow at responding. Modem: Sportster 56K internal PnP Sound Card: Creative Labs Sound Blaster 16 PnP. Postman