This is a list of drivers that are known to cause problems with suspending and resuming. The problem is generally not Suspend2, but rather a lack of power management support in the driver for your hardware.
In general, the work around is to build these portions as modules and ensure that they are unloaded before the kernel part of suspending begins.
This is not an exhaustive list. See also the HardwareCompatibility page.
- ACPI modules which can be built as modules (button, battery...)
- USB (May require unmount of /proc/bus/usb to get usbcore unloaded)
- Firewire (ieee1394)
- PCMCIA (pcmcia_core, yenta_socket...) May require cardctl eject.
CpuFreq