Up until about a week ago, I also had this problem, but it seems to have disappeared with a recent update.
I've now run about 10 consecutive suspend-to-ram cycles and the keyboard has worked every time. Either I've been very lucky, or a fix has been committed to the kernel or to acpi-support.
I'm using kernel 2.6.20-14-generic (amd64) and acpi-support 0.95.
Up until about a week ago, I also had this problem, but it seems to have disappeared with a recent update.
I've now run about 10 consecutive suspend-to-ram cycles and the keyboard has worked every time. Either I've been very lucky, or a fix has been committed to the kernel or to acpi-support.
I'm using kernel 2.6.20-14-generic (amd64) and acpi-support 0.95.