Hi, I needed to downgrade again. Using Windows XP (32 bit) Service Pack 3 as guest, in 2014-10-21 I upgraded iTunes to 12.0.1.26 and iOS 8.0.2 -> iOS 8.1 to an iPad 2 by an USB connection. In 2014-10-28 I upgraded virtualbox 4.3.12-1 -> 4.3.18-1. This month upgrading iOS 8.1 -> 8.1.1 by an USB connection failed. So I run # dkms remove -m vboxhost -v 4.3.18 --all # downgrade virtualbox virtualbox-host-dkms virtualbox-guest-iso # pacman -R virtualbox-ext-oracle # pacman -U /var/cache/aur/virtualbox-extension-pack-4.3.12-1-x86_64.pkg.tar.xz # dkms install vboxhost/4.3.12 -k 3.14.23-rt20-1-rt worked :) # dkms install vboxhost/4.3.12 -k 3.10.58-rt62-2-rt-lts worked :) _But_ unfortunately it doesn't work for the current kernel: # dkms install vboxhost/4.3.12 -k $(uname -r) Kernel preparation unnecessary for this kernel. Skipping... Building module: cleaning build area.... make KERNELRELEASE=3.17.3-1-ARCH -C /usr/lib/modules/3.17.3-1-ARCH/build M=/var/lib/dkms/vboxhost/4.3.12/build........................(bad exit status: 2) Error! Bad return status for module build on kernel: 3.17.3-1-ARCH (x86_64) Consult /var/lib/dkms/vboxhost/4.3.12/build/make.log for more information. I suspect this issue already startet after upgrading 3.16.4-1 -> 3.17.1-1. I upgraded virtualbox 4.3.12-1 -> 4.3.18-1, because building the modules for the kernel didn't work anymore. Any ideas how to build the vbox modules for the current linux package? Regards, Ralf PS: Now I try upgrading iOS 8.1 -> 8.1.1 using virtualbox 4.3.12-1. Perhaps virtualbox 4.3.18-1 isn't the culprit, but since I experienced a few USB issues before, I have good reason to expect that it will solve the issue.