The problem described below (of duplicate keystrokes in Syslinux on an Intel Mac) goes
away completely if you plug the keyboard into USB slot 1 on the back of the Mac.
The slot is usually the closest to the headphone jack, typically located in the back of
Any other USB slot triggers duplicate keystrokes when you navigate through the UDPCast
menu or even if you pull up a log TTY and try to type.
Hope this helps others who have had this problem with UDPCast.
Humberto J. Varela Humberto.Varela at utsa.edu
Fri Apr 13 02:56:41 CEST 2007
I am using two UDPCast cds (one sender, one receiver) to boot two Intel MacBooks in an
attempt to clone one to the other.
Ok, it didn't exactly work out 100%
Turns out when I boot my custom UDPCast cds, the SATA Disk Driver and the Marvell Yukon
Network chipset in the MacBook fight with each other for IRQ assignment, and UDPCast
finally just turns one IRQ off. IRQ 10.
Meanwhile, I attached an external Microsoft USB 105-Key Keyboard to a MacBook to see if
UDPCast would work with it and it did. But the "repeated ghost keystrokes" are
still happening that plague the internal MacBook keyboard. So it seems that UDPCast is
not playing well with the USB Controller in the MacBooks. It's not the keyboard.
It's the controller. If I can identify the USB controller manufacturer, I might be
able to insert the proper USB kernel module at boottime and finally be able to type into
UDPCast after it boots. That would make it easier to guide through the menu-driven system
that UDPCast uses in default-mode. It would also let me read the system boot log with the
limited shell that I call up.
So as for my experiment, both MacBooks boot up into a state that is ready-to-go, but they
can't see each other on the network. This is most likely due to the IRQ conflict
I'm getting from the SATA drive vs. the Network chipset.
Network ports do light up on the switch I'm using, but the two computers won't see
I've even tried two different switches in case one had some kind of internal circuit
that blocked Multicast Packet Storms or something...
Has anyone tried UDPCast cloning of Intel-based MacBooks?