Messages in this thread | | | Subject | [2.5] EHCI HID keyboard not unloaded at reboot time ? | From | Nicolas Mailhot <> | Date | 15 Feb 2003 17:03:00 +0100 |
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[ Please CC me any replies, I don't follow the list closely ]
Hi,
This is a question related to : http://bugzilla.kernel.org/show_bug.cgi?id=9
Basically I have a usb keyboard plugged on an external USB2 hub. Using a monolithic ehci/hid kernel I can get it to work in 2.5. It's also used in usb1 mode by the bios and the bootloader.
However when I shut down or reboot from 2.5, I loose keyboard support in the bios/bootloader/linux 2.4 (used to loose it in linux 2.5 also but recent ehci enhancements enable 2.5 to recover it). Nothing short of a PSU stop (neither reset nor stop button works) will recover it.
What happens is the usb subsystem is somehow not unloaded at shutdown/reboot time. The bios and linux 2.4 then find a usb subsystem already setup in usb2 mode, and since they only know usb1 handling, they are unable to recover usb devices. This is a pain when you have like me an usb-only input setup. It means crawling under the desk every shutdown time to reach the PSU power button, and feel the hardware aging prematurely (and I'm lucky to *have* a PSU power button, I imagine some other poor souls may have to unplug it to get the same effect).
I say the usb subsystem is somehow not unloaded because 1. when I request a shutdown the keyboard is still active after the « Power Down » message (this mobo wants acpi to shutdown properly so this is easy to check with a acpi-less kernel) 2. I sprinkled the ehci unloading function whith printks some time ago and it was never called. 3. the usb2 hub has a led to show if it's in usb1 or usb2 mode, and it stays on after the reboot (when cold-booting in uhci 2.4 it stays of)
Now I'm wondering if someone didn't decided at some time that shutdown=suspend and input devices should stay on in suspend mode so people can resume their system, ie maybe it's a design mistake instead of a simple bug.
Can anyone shed some light/advice on this problem ? It's driving me nuts.
Regards,
-- Nicolas Mailhot [unhandled content-type:application/pgp-signature] | |