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Diffstat (limited to 'Documentation/arch/x86/usb-legacy-support.rst')
| -rw-r--r-- | Documentation/arch/x86/usb-legacy-support.rst | 11 |
1 files changed, 1 insertions, 10 deletions
diff --git a/Documentation/arch/x86/usb-legacy-support.rst b/Documentation/arch/x86/usb-legacy-support.rst index e01c08b7c981..b17bf122270a 100644 --- a/Documentation/arch/x86/usb-legacy-support.rst +++ b/Documentation/arch/x86/usb-legacy-support.rst @@ -20,11 +20,7 @@ It has several drawbacks, though: features (wheel, extra buttons, touchpad mode) of the real PS/2 mouse may not be available. -2) If CONFIG_HIGHMEM64G is enabled, the PS/2 mouse emulation can cause - system crashes, because the SMM BIOS is not expecting to be in PAE mode. - The Intel E7505 is a typical machine where this happens. - -3) If AMD64 64-bit mode is enabled, again system crashes often happen, +2) If AMD64 64-bit mode is enabled, again system crashes often happen, because the SMM BIOS isn't expecting the CPU to be in 64-bit mode. The BIOS manufacturers only test with Windows, and Windows doesn't do 64-bit yet. @@ -38,11 +34,6 @@ Problem 1) compiled-in, too. Problem 2) - can currently only be solved by either disabling HIGHMEM64G - in the kernel config or USB Legacy support in the BIOS. A BIOS update - could help, but so far no such update exists. - -Problem 3) is usually fixed by a BIOS update. Check the board manufacturers web site. If an update is not available, disable USB Legacy support in the BIOS. If this alone doesn't help, try also adding |