Public bug reported: Hello,
I have a HP Pavillion DV6t-7000 laptop with an Nvidia 650M (hybrid) graphics card and a i7-3720QM processor. Using a fresh installation of Ubuntu quantal quartz, the laptop draws about 22W of power when idle. In comparison in Windows the laptop draws only about 9W in idle. The biggest fraction of this power increase (about 10W) is caused by the the Nvidia graphics card not powering down. If I understand it correctly, neither the Nvidia binary drivers nor nouveu drivers support optimus and its power management yet. To solve this problem I need to disable the graphics card using acpi_call [1] and run the disabling script every time after reboot or when the laptop comes out of suspend. As this basically halves power consumption (doubles battery life) on laptops with nvidia optimus graphics, it would be very helpful if Ubuntu could disable the nvidia optimus graphics card by default to make linux power consumption more reasonable, or at least provide a package to automatically disable the graphics card on reboot / resume and warn users about this. [1] http://hybrid-graphics-linux.tuxfamily.org/index.php?title=Acpi_call ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1045935 Title: Higher power consumption on laptop with nvidia optimus GPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1045935/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
