Hide Forgot
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.12) Gecko/20050922 Fedora/1.0.7-1.1.fc4 Firefox/1.0.7 Description of problem: This is a longstanding problem on Fujitsu P2120 notebooks, first reported by myself here: http://bugme.osdl.org/show_bug.cgi?id=1322. The IRQ assignment done by ACPI is not correct if the Ethernet interface is disabled on startup (running on battery mode). Prior to kernel 2.6.14, attempting to attach a USB device would result in a kernel hard-lock (need to remove power to recover). However, on 2.6.14, it gives an unhandled Interrupt driver crash debug information in dmesg, so perhaps some attempt to resolve this is possible. Version-Release number of selected component (if applicable): kernel-2.6.14 How reproducible: Always Steps to Reproduce: 1. Startup P2120 in battery-only mode (disables Ethernet device) 2. Check interrupt assignment for USB OHCI driver (invalid assignment to IRQ10) 3. Plug in USB device Actual Results: dmesg output indicate kernel module crashed Expected Results: Kernel USB driver module shouldn't crash Driver should attempt to reset IRQ assignment (?) Additional info: Currently I boot with acpi_irq_isa=10,11 to force kernel to skip IRQ 10 for automatic assignment to USB OHCI driver.
Created attachment 121011 [details] Default IRQ assignment when booting without 'acpi_irq_isa=10,11' IRQ 10 should never be assigned to USB OHCI devices, EHCI and OHCI devices (except one placed on IRQ11) should be placed on IRQ9. This problem does not occur if Ethernet device is enabled and activated.
Created attachment 121012 [details] Interrupt assignment for correct behavior
this is something that really needs to be worked out upstream. Otherwise we'll end up carrying a zillion patches to workaround broken bioses. Either put up with the boot command line, or try again to convince the upstream ACPI maintainer that its necessary.