I upgraded to 15.04 just before the official release, and have since then been met with this message at boot :

device descriptor read/64, error -32

and then :

Starting version 219

I could proceed the boot with ctrl+d, and thought that an update later on would resolve the problem. Now i discovered that the kernel 3.19 was not installed but have the system has been running on 3.16 kernel. So I installed the 3.19 kernel, but still gets the Starting version 219 but now with ACPI PPC probe failed. My graphics driver is AMD and I can't login with 3.19 kernel ( black screen, returns to login ) but it is possible with the 3.16 kernel. Using xserver-xorg-video-ati, let me login. Any hints how to proceed from here ?


I'm fixed this error upgrading to kernel 4.0.1:

wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.1-vivid/linux-headers-4.0.1-040001-generic_4.0.1-040001.201504290935_amd64.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.1-vivid/linux-headers-4.0.1-040001_4.0.1-040001.201504290935_all.deb
wget http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.0.1-vivid/linux-image-4.0.1-040001-generic_4.0.1-040001.201504290935_amd64.deb
sudo dpkg -i linux-headers-4.0.1*.deb linux-image-4.0.1*.deb
sudo update-grub
sudo reboot

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