I get a kernel OOPS using 2.6.16 and 2.6.16-git14, I was using 2.6.14.2 before without the problem. The OOPS happens when doing either echo "3" > /proc/acpi/sleep or echo "mem" > /sys/power/state As I have a laptop without serial ports, I'd have to write down the oops, so please forgive that I didn't write down ALL the output, I think I have the most important stuff, though. Please note that it also happens when mentioned modules are not linked in and that I enabled the kernel read-only pages option (although that doesn't seem to be related). I am not subscribed, so please CC. ========================= OOPS ==================== hci_usb: 2-1:1.1: no suspend for driver hci_usb? hci_usb: 2-1:1.0: no suspend for driver hci_usb? kernel tried to execute NX-protected page - exploit attempt? (uid 0) BUG: unable to handle kernel paging request at virtual address c04ce31 Printing EIP c04ce31c *pde = 00000000 Oops: 0011 [#1] Modules linked in: pl2303 usbserial ehci_hcd ipw2200 uhci_hcd CPU: 0 EIP: 0060:[<c04ce31c>] Not tainted VLI EFLAGS: 00010046 (2.6.16-git14 #4) EIP is at 0x04ce31c eax: c04dec00 ebx: c0001000 ecx: c000080 edx: 00000100 esi: 00000003 edi: 00000000 ebp: 0000046 esp: f4f0bef4 ds: 007b es: 007b ss: 0068 Process zsh (pid: 3657, threadinfo=f4f40a000, task=f4c0ea90) Stack: <0>c0244b4e c04e3f08 00000000 .... Call trace: acpi_pm_enter+0x53/0x99 suspend_enter+0x4f/0x60 enter_state+0xde/0x160 state_store+0x97/0xc0 state_store+0x0/0xc0 subsys_attr_store+0x29/0x40 sysfs_write_file+0x93/0xf0 vfs_write+0xa6/0x160 sysfs_write+0x0/0xf0 sys_write+0x41/0x70 sysenter_past_esp+0x54/0x75 Config and Map not included, they are rather big. Submission on request. - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html