Messages in this thread | | | Date | Mon, 6 Feb 2006 09:02:51 +0100 | From | "Carlo E. Prelz" <> | Subject | Re: [linux-usb-devel] Re: ATI RS480-based motherboard: stuck while booting with kernel >= 2.6.15 rc1 |
| |
Subject: Re: [linux-usb-devel] Re: ATI RS480-based motherboard: stuck while booting with kernel >= 2.6.15 rc1 Date: dom 05 feb 06 11:45:22 -0800
Quoting David Brownell (david-b@pacbell.net):
> Interesting ... feels like a BIOS problem. If you want to experiment, > there's a right bracket -- "}" -- immediately before that. Try moving > it right after that write, so that write_config_byte is covered by the > preceding "if LEGSUP_BIOS" test; or copying the much later "disable SMI" > clause into an "else" for that "if".
The first one would be useless - I inserted lots of printouts to find out where the freeze took place, and I know that the EHCI_USBLEGSUP_BIOS flag is on (cap is 0x10001). The value remains the same after the 'spin till it hands it over' loop - so that this printout appears:
0000:00:13.2 EHCI: BIOS handoff failed (BIOS bug ?)
About the second thing you suggest: do you refer to this call?
/* just in case, always disable EHCI SMIs */ pci_write_config_dword(pdev, offset + EHCI_USBLEGCTLSTS, 0);
In my machine, the write takes place without apparent ill effects. If I add it as an else clause to the "if LEGSUP_BIOS" test, it won't execute, because the EHCI_USBLEGSUP_BIOS flag is on.
In case you need it: hcc_params is 0xa012.
Carlo
-- * Se la Strada e la sua Virtu' non fossero state messe da parte, * K * Carlo E. Prelz - fluido@fluido.as che bisogno ci sarebbe * di parlare tanto di amore e di rettitudine? (Chuang-Tzu) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |