Sysfs, PCI-devices and power management
Hi, I don't know if this is the "right place(TM)" to ask about this, and if it isn't, I apologize. But the fact is that I haven't found any help from anywhere else and I can't learn enough without asking. So, the situation is like this: I am using a laptop and want to minimize the power consumption by shutting down unneeded components. Under windozer a program called Battery Doubler does the same by for example shutting down not-needed PCI devices. I too, tried to shut down certain devices by doing "echo 3 > /sys/devices/pci*/*0a*/power/state", but that didn't work. state was still a zero. So, I then echoed a "3" to detach_state and removed the module, after which */power/state was 3. Now, I then tried again changing it with no luck. Echoing a 1 to detach_state, modprobing and rmmoding the module did the trick, but I still can't get it back to state 0. Also, I read from the kernel documentations that echoing something to power/state should work, without toying around with the modules, but apparently that is b0rked. So, is there any way to fix this? Or, could someone do a simple C-program for changing the state of the devices? I don't know enough about PCI or programming under Linux, so my experiments with pci_set_power_state didn't work out quite the way they were supposed to =/ Also, the kernel in question is 2.6.10, though this hasn't worked with any other version either. I am not a regular reader in here, so please be kind and answer directly to me. -WareKala - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Sysfs, PCI-devices and power management
Hi, I don't know if this is the right place(TM) to ask about this, and if it isn't, I apologize. But the fact is that I haven't found any help from anywhere else and I can't learn enough without asking. So, the situation is like this: I am using a laptop and want to minimize the power consumption by shutting down unneeded components. Under windozer a program called Battery Doubler does the same by for example shutting down not-needed PCI devices. I too, tried to shut down certain devices by doing echo 3 /sys/devices/pci*/*0a*/power/state, but that didn't work. state was still a zero. So, I then echoed a 3 to detach_state and removed the module, after which */power/state was 3. Now, I then tried again changing it with no luck. Echoing a 1 to detach_state, modprobing and rmmoding the module did the trick, but I still can't get it back to state 0. Also, I read from the kernel documentations that echoing something to power/state should work, without toying around with the modules, but apparently that is b0rked. So, is there any way to fix this? Or, could someone do a simple C-program for changing the state of the devices? I don't know enough about PCI or programming under Linux, so my experiments with pci_set_power_state didn't work out quite the way they were supposed to =/ Also, the kernel in question is 2.6.10, though this hasn't worked with any other version either. I am not a regular reader in here, so please be kind and answer directly to me. -WareKala - To unsubscribe from this list: send the line unsubscribe linux-kernel in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/