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    SubjectThink 2.4.10 broke my PCI subsystem.
    Date
    I've recently been okaying around with low cost motherboards and have been
    problems on two of them: the BIOSTAT micro-ATX mobo M7VKQ, and the ESC L7SOM
    mobos.

    BOth work fine so long as I hold the kernel to 2.4.9 or earlier. Once the
    2.4.10 patch is applied, the kernel no longer recognises the PCI Buss.

    Under 2.4.9 /proc/pci shows:

    PCI devices found:
    Bus 0, device 0, function 0:
    Host bridge: PCI device 1039:0740 (Silicon Integrated Systems [SiS]) (rev 1).
    Master Capable. Latency=32.
    Non-prefetchable 32 bit memory at 0xe8000000 [0xe8ffffff].
    Bus 0, device 1, function 0:
    PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP (rev 0).
    Master Capable. Latency=99. Min Gnt=12.
    Bus 0, device 2, function 0:
    ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513 (rev 0).
    Bus 0, device 2, function 5:
    IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev 208).
    Master Capable. Latency=16.
    I/O at 0x4000 [0x400f].
    Bus 0, device 2, function 7:
    Multimedia audio controller: PCI device 1039:7012 (Silicon Integrated Systems [SiS]) (rev 160).
    IRQ 10.
    Master Capable. Latency=32. Min Gnt=52.Max Lat=11.
    I/O at 0xe000 [0xe0ff].
    I/O at 0xe400 [0xe47f].
    Bus 0, device 15, function 0:
    Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139 (rev 16).
    IRQ 11.
    Master Capable. Latency=32. Min Gnt=32.Max Lat=64.
    I/O at 0xe800 [0xe8ff].
    Non-prefetchable 32 bit memory at 0xe9102000 [0xe91020ff].
    Bus 1, device 0, function 0:
    VGA compatible controller: PCI device 1039:6325 (Silicon Integrated Systems [SiS]) (rev 0).
    Prefetchable 32 bit memory at 0xe0000000 [0xe7ffffff].
    Non-prefetchable 32 bit memory at 0xe9000000 [0xe901ffff].
    I/O at 0xd000 [0xd07f].

    Using lspci:

    00:00.0 Host bridge: Silicon Integrated Systems [SiS] 740 Host (rev 01)
    00:01.0 PCI bridge: Silicon Integrated Systems [SiS] 5591/5592 AGP
    00:02.0 ISA bridge: Silicon Integrated Systems [SiS] 85C503/5513
    00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE] (rev d0)
    00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 PCI Audio Accelerator (rev a0)
    00:0f.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
    01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS]: Unknown device 6325

    From DMESG:

    POSIX conformance testing by UNIFIX
    PCI: PCI BIOS revision 2.10 entry at 0xfb5f0, last bus=1
    PCI: Probing PCI hardware
    PCI: Using IRQ router SIS [1039/0008] at 00:02.0
    Linux NET4.0 for Linux 2.4

    After rebuilding with any kernel greater than patch level 9, I get the following
    messages as part of the boot sequence:

    mtrr: detected mtrr type: Intel
    PCI: PCI BIOS revision 2.10 entry at 0xfb5f0, last bus=1
    PCI: System does not support PCI
    isapnp: Scanning for PnP cards...

    HELP PLEASE! I don't want to be stuck on 2.4.9 forever!

    I have one development box that I can do just about anything you wish to.
    Please let me know how to help.

    Thanks,

    Kevin C.
    --
    Kevin Carpenter: KevinC@SeaPlace.org
    Kevin's Home Page: http://www.seaplace.org/kevinc
    (Expressing his comments from home in St. Louis, where this message originated)
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