Date: Wed, 19 Jul 2000 01:53:26 -0700 From: Elle Yoko Suzuki <suzuki@CSUA.Berkeley.EDU> To: freebsd-questions@freebsd.org Subject: IRQ issues? Message-ID: <200007190853.BAA06640@soda.csua.Berkeley.edu>
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hi. I run FreeBSD 3.2-RELEASE here's my scenario: i've just recently acquired a SCSI-2 PCI controller (Adaptec 2940) and a SCSI HP DDS1 tape drive. these components seem to work fine. however, there seems to be a problem between the SCSI controller and the 3Com ethernet card (3C509). upon attempting to connect to net via our DSL line, ping showed anywhere from 94% to 100% packet loss both to our router and any outside machine. traceroute showed that each packet, for each hop each time, took ~2000 ms back and forth. upon removing the new devices, net access went back to normal. there may be an IRQ conflict. according to my kernel configuration file, the ethernet card -- device ep0 -- is set to irq 10. i've tried to edit the kernel configuration file to change the ep0 irq to something else, say 11. unfortunately, this caused a conflict with the sound card (i'm guessing from the dmesg line. this sound card is actually not found or supported for FreeBSD 3.2, i understand: a SB PCI 128). i removed the sound card, which i haven't been able to use anyway. at this point, i believed that the ethernet card was set to irq 11, now available, and the scsi controller to irq 10. however, upon reboot, i find that a conflict still exists: the coexistence of the ethernet card and scsi controller card still cause major net laggage. several questions arise: 1. is this even IRQ related? if not, what are some other possible reasons for the problem? (assuming that this is IRQ-related...) 2. is the irq indeed able to be set from the kernel configuration file, and then definitely read by the bootup/device probing process? (the dmesg thinks the ep0 is set to irq 11, as i had configured, but someone had mentioned to me that i shouldn't have been able to do that.) 3. the line for the controller currently only reads: controller ahc0 what if i were to set the irq of ahc0 to something that wasn't in use by another conflicting device, say irq 5? i'm not sure what the appropriate syntax would be to follow the 'ahc0' in the line above, even from glancing at the other lines with 'irq ...' info set in them in the kernel configuration file. any and all advice on this matter would be greatly appreciated. thanks, -elle To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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