This bug isn't solved, look at bug #475881 In bug #486499 user mentions about a workaround, but it doesn't help in my case. In bug #454930 you can find similar problem, but with Windows XP.
>From my investigation I found, that windows bootloader is starting and loading some files, but after initialization process it wants to access files via root drive and can't find this files. My Windows 7 64bit always reboots without any BSOD or error message, so it is only my guess. I have tried using some workaround, like removing search command, but nothing helps. At last I installed Grub1, it works like a charm, but for not so experienced user it will be too hard to fix. To make things 'worse', on second computer with similar configuration everything is OK. It has Windows 7 64bit on sda1 and Ubuntu 32bit on extended partition (sda5 or sda6 ext4). Disk is SATA2. I don't know how exactly grub2 works, but maybe it wrongly passes root disk to windows or can't find it? My SDA partitions: Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x000e1244 Device Boot Start End Blocks Id System /dev/sda1 * 1 8924 71681998+ 7 HPFS/NTFS (windows root - c:) /dev/sda2 8925 60671 415657777+ f W95 Ext'd (LBA) /dev/sda3 60672 60801 1044225 82 Linux swap / Solaris /dev/sda5 8925 50333 332617761 7 HPFS/NTFS (partition for data) /dev/sda6 50334 54223 31246393+ 83 Linux (root /) /dev/sda7 54224 60671 51793528+ 83 Linux (/home) -- grub2 Windows 7 fails to start. https://bugs.launchpad.net/bugs/402154 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs