ok, a final story about what i have done now. While the problem was always present with the pci=noacpi option i searched now for a other solutions..
By trying to boot with grub console and without the splash screen i saw, that he comes to the initrd.img ... so i modified the options for the inird.img: in /etc/initramfs-tools/initramfs.conf i changed MODULES=most to MODULES=dep and also i added the follow lines to /etc/modprobe.d/blacklist blacklist ieee1394 blacklist ohci1394 after that i removed the pci=noacpi option from grubs menu.lst and executed rmmod ohci1394 rmmod sbp2 rmmod ieee1394 update-initramfs -u Now the system boots up correctly :-) -- ohci1394 driver loop at boot time (Iso Xmit # Context died) https://bugs.launchpad.net/bugs/283612 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