On Sat, Dec 22, 2012 at 10:52:53AM -0000, montini wrote: > Is there any information if it is safe to start 12.10 live USB flash in > mode "UEFI and CMS" (mixed bootloader) on NP530U3C-A05EE? Or only the > plain CMS is safe at the moment?
Only plain CMS is safe. Mixed bootloader options are specifically *not* safe, because the live USB disk will be bootable under UEFI. > I.e. is it only possible to dual boot ubuntu and win8 by switching boot > mode in the BIOS settings or "UEFI and CMS" method is safe aswell? Once you have Ubuntu installed in CMS mode, it will be safe to dual boot because a UEFI boot loader will not be installed. But for first boot and installation, you would need the machine to be in CMS mode only. Also, if you are willing to help us test a fix for this issue, the following would be useful. It does present some risk of bricking your laptop (if our patch is wrong), so please only do this if you're willing to risk having to RMA your machine! - put the BIOS in CMS mode - install Ubuntu to the internal hard drive - install Colin King's test kernel package from here: http://kernel.ubuntu.com/~cking/samsung-1040557 - put the BIOS back into "UEFI and CMS" mode - boot Ubuntu - verify that the samsung-laptop module still gives you access to your hot keys - configure your /etc/fstab to mount the EFI system partition (as used by Windows) at /boot/efi, and mount the partition - install the grub-efi package (note: this may require additional manual configuration to get it fully set up, I'm afraid I can't give very good instructions here) - reboot to Ubuntu using grub-efi, taking care to confirm that you're really booting the efi version of grub - verify that the samsung-laptop module does not brick your laptop If you're not willing to risk your laptop on this test, that's perfectly understandable. In that case, you should be fine to just install Ubuntu on the machine in CMS mode. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1040557 Title: UEFI boot live-usb bricks SAMSUNG 530U3C,np700z5c laptop To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-cdimage/+bug/1040557/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
