2.4.22 (also 2.4.23pre1) and NEC USB lockup problem

From: Staszek Pa¶ko (staszek_at_nutki.com)
Date: 08/30/03

  • Next message: Marcelo Tosatti: "Re: Andrea VM changes" 
    Date:	Sat, 30 Aug 2003 21:17:26 +0200 (CEST)
To: linux-kernel@vger.kernel.org

    Hi,

    I have a Transmeta Crusoe based Fujitsu LOOX T93B laptop (pretty much
    the same as Fujitsu P2120 AFAIR). It is equipped with ALI OHCI USB 1.1
    controller + NEC EHCI USB 1.1+2.0 controller. I wanted to give a try
    to 2.4.22 kernel (i am still using 2.4.21-pre3, which works fine with
    ACPI patches), but the system would lock hard whenever inserting any
    USB device (sole USB system seems to start up with no problems). The
    problem is probably with usb-ohci module which handles the NEC
    controllers USB 1.1 part, where the devices get connected to.

    IRQ routing is done via ACPI and IRQ distribution has changed from
    2.4.21-pre3 + acpi 20030109 - maybe this matters:
    2.4.21-pre3: usb_ohci: irq 11 ALI, irq 9 (*2) NEC; usb_ehci: irq 9;
    also on irq 9: wlan, audio, acpi
    2.4.22: usb_ohci: irqs 10 ALI, 10+11 NEC; usb_ehci: irq 5 (shared with
    audio)
    Without ACPI USB doesn't get IRQs assigned and does not work at all
    (although the system does not hang). APIC is compiled-in, but is not
    detected (/proc
    interrupts reports XT-PIC).

    SYSRQ doesn't work after the hang, and also compiling the kernel with all
    debug options didn't produce any more messages. This most probably is some
    kind of deadlock, since the CPU is warming up fast. Idon't know what I
    could do to diagnose it further, i don't know much about USB...

    Any advice would be welcome.

    PS. Please, Cc me directly, i read the list periodically via google. 

    -- 
Staszek Pa¶ko     | Come, now. God, root, what's the difference ?
staszek@nutki.com | (c) UserFriendly.org
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