From: Pavel Machek Without this patch, Linux provokes emergency disk shutdowns and similar nastiness. It was in SuSE kernels for some time, IIRC. Signed-off-by: Pavel Machek Signed-off-by: Andrew Morton --- kernel/sys.c | 3 +++ 1 files changed, 3 insertions(+) diff -puN kernel/sys.c~properly-stop-devices-before-poweroff kernel/sys.c --- 25/kernel/sys.c~properly-stop-devices-before-poweroff 2005-05-02 18:59:22.000000000 -0700 +++ 25-akpm/kernel/sys.c 2005-05-02 18:59:22.000000000 -0700 @@ -405,6 +405,7 @@ asmlinkage long sys_reboot(int magic1, i case LINUX_REBOOT_CMD_HALT: notifier_call_chain(&reboot_notifier_list, SYS_HALT, NULL); system_state = SYSTEM_HALT; + device_suspend(PMSG_SUSPEND); device_shutdown(); printk(KERN_EMERG "System halted.\n"); machine_halt(); @@ -415,6 +416,7 @@ asmlinkage long sys_reboot(int magic1, i case LINUX_REBOOT_CMD_POWER_OFF: notifier_call_chain(&reboot_notifier_list, SYS_POWER_OFF, NULL); system_state = SYSTEM_POWER_OFF; + device_suspend(PMSG_SUSPEND); device_shutdown(); printk(KERN_EMERG "Power down.\n"); machine_power_off(); @@ -431,6 +433,7 @@ asmlinkage long sys_reboot(int magic1, i notifier_call_chain(&reboot_notifier_list, SYS_RESTART, buffer); system_state = SYSTEM_RESTART; + device_suspend(PMSG_FREEZE); device_shutdown(); printk(KERN_EMERG "Restarting system with command '%s'.\n", buffer); machine_restart(buffer); _