On 12-12-07 21:26, Rene Herman wrote:
On 12-12-07 21:07, David P. Reed wrote:
Someone might have an in to nVidia to clarify this, since I don't. In any case, the udelay(2) approach seems to be a safe fix for this machine.
By the way, _does_ anyone have a contact at nVidia who could clarify? Alan maybe? I'm quite curious what they did...
Summary:
Unless after booting with "acpi=off", outputs to port 0x80 (the legacy way to delay I/O) reliably, but not immediately, hang MCP51 machines. Outputs to port 0xed do not indicating it's a not a generic bus abort problem.