Limit Clevo M720SR to C2, going to C3 makes the machine freeze. This needs more investigation, sis chipset/bios problem may be? Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com> --- drivers/acpi/processor_idle.c | 3 +++ 1 file changed, 3 insertions(+) --- linux-2.6.33-rc8-git4-t2/drivers/acpi/processor_idle.c.orig 2010-02-20 12:45:35.000000000 +0200 +++ linux-2.6.33-rc8-git4-t2/drivers/acpi/processor_idle.c 2010-02-20 12:53:39.679099592 +0200 @@ -110,6 +110,9 @@ static struct dmi_system_id __cpuinitdat DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"), DMI_MATCH(DMI_BIOS_VERSION,"SHE845M0.86C.0013.D.0302131307")}, (void *)2}, + { set_max_cstate, "Clevo M720SR", { + DMI_MATCH(DMI_BIOS_VENDOR,"Phoenix Technologies LTD"), + DMI_MATCH(DMI_PRODUCT_NAME,"M720SR")}, (void *)2}, { set_max_cstate, "Pavilion zv5000", { DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), DMI_MATCH(DMI_PRODUCT_NAME,"Pavilion zv5000 (DS502A#ABA)")},