From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030703 Description of problem: Legacy SB card does not work in Severn because of a reported probable IRQ conflict (i.e. sound is chopped). However, /proc/interrupts shows there is no IRQ conflict, and changing the soundcard IRQ does not change the behaviour. Version-Release number of selected component (if applicable): kernel-2.4.21-20.1.2024.2.1.nptl How reproducible: Always Steps to Reproduce: 1. Boot kernel (w/ or w/o ACPI) Actual Results: Soundblaster audio driver Copyright (C) by Hannu Savolainen 1993-1996 sb: No ISAPnP cards found, trying standard ones... SB 4.13 detected OK (220) sb: Interrupt test on IRQ7 failed - Probable IRQ conflict Expected Results: No IRQ conflict report and a working soundcard. Additional info: $ cat /proc/interrupts CPU0 0: 116001 XT-PIC timer 1: 1894 XT-PIC keyboard 2: 0 XT-PIC cascade 5: 0 XT-PIC usb-uhci, usb-uhci 7: 0 XT-PIC soundblaster 8: 1 XT-PIC rtc 11: 3811 XT-PIC eth0 12: 76765 XT-PIC PS/2 Mouse 14: 13934 XT-PIC ide0 15: 1635 XT-PIC ide1 NMI: 0 ERR: 0
Created attachment 94175 [details] dmesg output I've managed to get sb working with 'acpi=off' and reserving IRQ 5 for legacy ISA in the BIOS. However, when ACPI is enabled, it uses IRQ 5 as shown in the dmesg attachment, which creates the conflict with sb.