Ah, indeed it seems btrfs is unhappy on your machine. Setting back to New for now, as I don't know how to debug this kernel/fs bug from here on, I'm afraid.
** Summary changed: - ubuntu 15.04 hangs at purple scren even with nomodeset + btrfs-transaction hangs ** Package changed: linux-flo (Ubuntu) => linux (Ubuntu) ** Changed in: linux (Ubuntu) Status: Incomplete => New ** Tags removed: systemd-boot -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-flo in Ubuntu. https://bugs.launchpad.net/bugs/1444070 Title: btrfs-transaction hangs Status in linux package in Ubuntu: New Bug description: After installing Ubuntu 15.04 a few times, I'm always having the same problem, after booting the system several times, it always hangs at plymouth. Before the problem takes place I always notice some flickering on the screen after plymouth The problem persists even with the nomodeset parameter or with recovery mode. I'm using a Acer Asipire V5-552G. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1444070/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp