[Bug 31879] i8042 error - keyboard does not work (kernel patch provided)

[dave_rodgman]

Public bug reported:
https://launchpad.net/malone/bugs/31879

Affects: linux-meta linux-image-2.6-k7 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed

Description:
On bootup, the keyboard doesn't work - I get the following error message
immediately after "decompressing kernel"

i8042.c: Can't read CTR while initializing i8042.

After that, I have no (regular, not usb) keyboard. This problem is
discussed here - apparently something to do with legacy USB support in
the BIOS.

http://www.opensubscriber.com/message/linux-
kernel at vger.kernel.org/567230.html

I've tried many boot options, including - nosmp, usb-handoff, acpi=off,
and all the i8042.xxx ones. None of them help (usb-handoff is said to
work, but is unsupported in the latest dapper kernel). Reverting to
kernel 2.6.12 fixes it. Also tried fiddling with USB options in the
BIOS. Disabling USB works, but obviously it kills my mouse.

Hardware: 2xAthlon 2800 on GA7ZNMH motherboard, non-usb keyboard.

The following patch works for me:

--- linux-2.6.15/drivers/usb/host/pci-quirks.c  2006-01-14 20:45:29.000000000 +0000
+++ linux-2.6.15-keyboard-patch/drivers/usb/host/pci-quirks.c   2006-01-14 22:02:14.000000000 +0000
@@ -172,6 +172,7 @@
 
 static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev)
 {
+#ifdef COMMENTTHISREGIONOUTTOENABLEKEYBOARD
        void __iomem *base;
        int wait_time;
        u32 control;
@@ -212,6 +213,7 @@
        writel(~(u32)0, base + OHCI_INTRSTATUS);
 
        iounmap(base);
+#endif
 }
 
 static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev)