Failure booting from USB using ubuntu-12.04.3-desktop-i386.iso on a Dell Inspiron 9300: - Repeated "/init: line 7: can't open /dev/sr0: No medium found" over and over - Error: Unable to find a medium containing a live file system - Drops into shell prompt: (initramfs)
The USB was made with a direct "dd" onto the USB key: dd if=ubuntu-12.04.3-desktop-i386.iso of=/dev/sdb (Same errors happened with a USB key loaded using some other Windows USB creator utility.) Solution: - Use F6 to interrupt the boot. - Optional: remove the keywords "quiet splash" from the kernel line. - Add the keywords "break debug" to the kernel line and continue the boot. - Part way into the boot, it will drop to the "(initramfs)" prompt. - Doing "ls -l /dev/sd*" will show only sda devices - no sdb devices. - Wait a few minutes. Various messages will print. Keep waiting. - After a few minutes, doing "ls -l /dev/sd*" will show the USB key (sdb* devices). - Now, exit the shell and continue the boot. - It comes up fine. Seems to be a timing issue with getting the USB /dev/sdb* devices recognized right after boot. Adding the break and debug (probably only one of these is actually needed but I don't know which) slows down the process and waits long enough so that the USB device can be found by the kernel correctly. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/500822 Title: /init: line 7: can't open /dev/sr0: No medium found To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/500822/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
