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    SubjectRe: what is pci=biosirq
    The error message idicates that the MPS table doesn't provide interrupt
    routing information for that PCI slot. I ran into the same problem
    on my K6 machine. I was able to fix it in the BIOS. In the BIOS setup
    go to the `Advaned' page. Look under `Installed O/S'. It probably
    says something silly like `Win95' or `Win98/Win2000'. Change it to
    `Other' and your problem should go away.

    On Sat, Mar 31, 2001 at 06:37:41PM -0800, xcp wrote:
    > I have an ALi chipset motherboard that seems to function normally. K6-2
    > 450, 256mb ram, 20gb ide fujitsu hard disk. Every time I boot up I get
    > this unsettling message about PCI: No IRQ known for interrupt pin A of
    > device 00:0f.0. Please try using pci=biosirq.
    >
    > It turns out that 00:0f.0 is my ALi ide controller: 00:0f.0 IDE
    > interface: Acer Laboratories Inc. [ALi] M5229 IDE (rev c1)
    >
    > Is this normal, or what should I do to "fix" it? Changing plug and play
    > OS in the bios has no effect.
    >
    > dmesg and lspci follow:
    >
    > Linux version 2.4.3 (root@coffee) (gcc version 2.95.3 20010315 (release))
    > #2 Sat Mar 31 17:50:50 PST 2001
    > BIOS-provided physical RAM map:
    > BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
    > BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
    > BIOS-e820: 00000000000f0000 - 0000000000100000 (reserved)
    > BIOS-e820: 0000000000100000 - 000000000fffc000 (usable)
    > BIOS-e820: 000000000fffc000 - 000000000ffff000 (ACPI data)
    > BIOS-e820: 000000000ffff000 - 0000000010000000 (ACPI NVS)
    > BIOS-e820: 00000000ffff0000 - 0000000100000000 (reserved)
    > On node 0 totalpages: 65532
    > zone(0): 4096 pages.
    > zone(1): 61436 pages.
    > zone(2): 0 pages.
    > Kernel command line:
    > Initializing CPU#0
    > Detected 451.019 MHz processor.
    > Console: colour VGA+ 80x25
    > Calibrating delay loop... 901.12 BogoMIPS
    > Memory: 255860k/262128k available (826k kernel code, 5880k reserved, 271k
    > data, 176k init, 0k highmem)
    > Dentry-cache hash table entries: 32768 (order: 6, 262144 bytes)
    > Buffer-cache hash table entries: 16384 (order: 4, 65536 bytes)
    > Page-cache hash table entries: 65536 (order: 6, 262144 bytes)
    > Inode-cache hash table entries: 16384 (order: 5, 131072 bytes)
    > CPU: Before vendor init, caps: 008021bf 808029bf 00000000, vendor = 2
    > CPU: L1 I Cache: 32K (32 bytes/line), D cache 32K (32 bytes/line)
    > CPU: After vendor init, caps: 008021bf 808029bf 00000000 00000002
    > CPU: After generic, caps: 008021bf 808029bf 00000000 00000002
    > CPU: Common caps: 008021bf 808029bf 00000000 00000002
    > CPU: AMD-K6(tm) 3D processor stepping 0c
    > Checking 'hlt' instruction... OK.
    > POSIX conformance testing by UNIFIX
    > mtrr: v1.37 (20001109) Richard Gooch (rgooch@atnf.csiro.au)
    > mtrr: detected mtrr type: AMD K6
    > PCI: PCI BIOS revision 2.10 entry at 0xf0720, last bus=1
    > PCI: Using configuration type 1
    > PCI: Probing PCI hardware
    > PCI: Using IRQ router ALI [10b9/1533] at 00:07.0
    > Linux NET4.0 for Linux 2.4
    > Based upon Swansea University Computer Society NET3.039
    > Initializing RT netlink socket
    > Starting kswapd v1.8
    > pty: 512 Unix98 ptys configured
    > block: queued sectors max/low 170010kB/56670kB, 512 slots per queue
    > Uniform Multi-Platform E-IDE driver Revision: 6.31
    > ide: Assuming 33MHz system bus speed for PIO modes; override with
    > idebus=xx
    > ALI15X3: IDE controller on PCI bus 00 dev 78
    > PCI: No IRQ known for interrupt pin A of device 00:0f.0. Please try using
    > pci=biosirq.
    > ALI15X3: chipset revision 193
    > ALI15X3: not 100% native mode: will probe irqs later
    > ide0: BM-DMA at 0xb000-0xb007, BIOS settings: hda:DMA, hdb:pio
    > ide1: BM-DMA at 0xb008-0xb00f, BIOS settings: hdc:pio, hdd:pio
    > hda: FUJITSU MPF3204AT, ATA DISK drive
    > ide: Assuming 33MHz system bus speed for PIO modes; override with
    > idebus=xx
    > hdc: RICOH CD-R/RW MP7040A, ATAPI CD/DVD-ROM drive
    > ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
    > ide1 at 0x170-0x177,0x376 on irq 15
    > hda: 40031712 sectors (20496 MB) w/512KiB Cache, CHS=2491/255/63, UDMA(33)
    > Partition check:
    > hda: hda1 hda2 < hda5 hda6 > hda3 hda4
    > Serial driver version 5.05 (2000-12-13) with MANY_PORTS SHARE_IRQ
    > SERIAL_PCI enabled
    > ttyS00 at 0x03f8 (irq = 4) is a 16550A
    > PPP generic driver version 2.4.1
    > PPP Deflate Compression module registered
    > PPP BSD Compression module registered
    > NET4: Linux TCP/IP 1.0 for NET4.0
    > IP Protocols: ICMP, UDP, TCP
    > IP: routing cache hash table of 2048 buckets, 16Kbytes
    > TCP: Hash tables configured (established 16384 bind 16384)
    > ip_tables: (c)2000 Netfilter core team
    > NET4: Unix domain sockets 1.0/SMP for Linux NET4.0.
    > cryptoapi: Registered sha1 (0)
    > cryptoapi: Registered rijndael-ecb (0)
    > cryptoapi: Registered rijndael-cbc (65536)
    > cryptoapi: Registered aes-ecb (0)
    > cryptoapi: Registered aes-cbc (65536)
    > cryptoapi: Registered blowfish-ecb (0)
    > cryptoapi: Registered blowfish-cbc (65536)
    > cryptoapi: Registered des-ecb (0)
    > cryptoapi: Registered des-cbc (65536)
    > cryptoapi: Registered des_ede3-ecb (0)
    > cryptoapi: Registered des_ede3-cbc (65536)
    > VFS: Mounted root (ext2 filesystem) readonly.
    > Freeing unused kernel memory: 176k freed
    > Adding Swap: 128516k swap-space (priority -1)
    > PCI: Found IRQ 3 for device 00:09.0
    > 3c59x.c:LK1.1.13 27 Jan 2001 Donald Becker and others.
    > http://www.scyld.com/network/vortex.html
    > See Documentation/networking/vortex.txt
    > eth0: 3Com PCI 3c900 Boomerang 10baseT at 0xb800, 00:60:97:c7:a6:82, IRQ
    > 3
    > product code 4843 rev 00.0 date 09-07-00
    > 8K word-wide RAM 3:5 Rx:Tx split, autoselect/10baseT interface.
    > Enabling bus-master transmits and whole-frame receives.
    > eth0: scatter/gather enabled. h/w checksums disabled
    > Real Time Clock Driver v1.10d
    > inserting floppy driver for 2.4.3
    > Floppy drive(s): fd0 is 1.44M
    > FDC 0 is a post-1991 82077
    > loop: loaded (max 8 devices)
    > hdc: set_drive_speed_status: status=0x40 { DriveReady }
    > hdc: ATAPI 20X CD-ROM CD-R/RW drive, 2048kB Cache, DMA
    > Uniform CD-ROM driver Revision: 3.12
    > usb.c: registered new driver hub
    > PCI: Found IRQ 7 for device 00:02.0
    > PCI: Setting latency timer of device 00:02.0 to 64
    > usb-ohci.c: USB OHCI at membase 0xd084f000, IRQ 7
    > usb-ohci.c: usb-00:02.0, Acer Laboratories Inc. [ALi] M5237 USB
    > usb.c: new USB bus registered, assigned bus number 1
    > hub.c: USB hub found
    > hub.c: 2 ports detected
    > es1370: version v0.34 time 17:48:44 Mar 31 2001
    > PCI: Found IRQ 10 for device 00:0a.0
    > es1370: found adapter at io 0xb400 irq 10
    > es1370: features: joystick on, line in, mic impedance 0
    > gameport0: NS558 ISA at 0x200 size 8 speed 1125 kHz
    > js0: Joystick device for input0
    > event0: Event device for input0
    > input0: Gravis Xterminator Digital on gameport0.0
    > Linux agpgart interface v0.99 (c) Jeff Hartmann
    > agpgart: Maximum main memory to use for agp memory: 203M
    > agpgart: Detected Ali M1541 chipset
    > agpgart: AGP aperture is 64M @ 0xe0000000
    > [drm] AGP 0.99 on ALi M1541 @ 0xe0000000 64MB
    > [drm] Initialized tdfx 1.0.0 20000928 on minor 63
    > eth0: first available media type: 10baseT
    >
    > 00:00.0 Host bridge: Acer Laboratories Inc. [ALi] M1541 (rev 04)
    > 00:01.0 PCI bridge: Acer Laboratories Inc. [ALi] M5243 (rev 04)
    > 00:02.0 USB Controller: Acer Laboratories Inc. [ALi] M5237 USB (rev 03)
    > 00:03.0 Bridge: Acer Laboratories Inc. [ALi] M7101 PMU
    > 00:07.0 ISA bridge: Acer Laboratories Inc. [ALi] M1533 PCI to ISA Bridge
    > [Aladdin IV] (rev c3)
    > 00:09.0 Ethernet controller: 3Com Corporation 3c900 10BaseT [Boomerang]
    > 00:0a.0 Multimedia audio controller: Ensoniq ES1370 [AudioPCI]
    > 00:0f.0 IDE interface: Acer Laboratories Inc. [ALi] M5229 IDE (rev c1)
    > 01:00.0 VGA compatible controller: 3Dfx Interactive, Inc. Voodoo 3 (rev
    > 01)
    >
    >
    > -
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    --
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    "Censeo Toto nos in Kansa esse decisse." - D. Gale
    n0ano@valinux.com
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