thanks for reminding me , i found that the problem is grub bootloader , after using lilo bootloader instead of grub , now its fine
-- cannot run live cd or install ubuntu all version https://bugs.launchpad.net/bugs/173648 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
