[EMAIL PROTECTED] (Mark Phillips) writes: > Can you tell, just by looking at /proc/interrupts, whether there is an > interrupt conflict? > > In particular, how does it work for pcmcia cards for a laptop?
Well, let's take a look. Here's what my /proc/interrupts says: 0: 3736694 timer 1: 60282 keyboard 2: 0 cascade 3: 22149 + serial 5: 1 sound blaster 9: 182163 3c589_cs 11: 8 i82365 13: 1 math error 14: 351147 + ide0 Here's what this means: Interrupt 0: the timer Interrupt 1: the keyboard Interrupt 2: same as 9 Interrupt 3: my serial mouse Interrupt 5: my sound card Interrupt 9: my PCMCIA network card Interrupt 11: the PCMCIA controller Interrupt 14: my hard drive You can search for conflicts caused by the PCMCIA utilities by listing the contents of /proc/interrupts with the PCMCIA card manager disabled (execute as root `/etc/init.d/pcmcia stop') and observing at what interrupts are being used. On my system, the sound card likes to use irq 5. Therefore, I exclude this interrupt from being used by a PCMCIA card by placing the following line in /etc/pcmcia/config.opts: exclude irq 5 Without this line, my sound card does not work sometimes because the PCMCIA system seizes irq 5. This is evident in /proc/interrupts as a line such as 5: 2149 3c589_cs This shows that irq 5 has been assigned to my PCMCIA network card and hence is not available for use by the sound card. When worrying about interrupt conflicts, keep in mind that use irq 4 is often used for the first and third serial ports and irq 3 is often used for the second and fourth serial ports. The parallel port likes to use irq 7, so you might want to exclude it in config.opts if you are hooked up to a printer or are using plip to connect to another computer. If, however, you never use your parallel port and your PCMCIA cards at the same time, then you probably don't need to worry about it. Brian -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .