I have the same problem on a ThinkPad Carbon X1 with ubuntu wily.
since the last kernel update my DisplayLink dock isn't working proper at all. No graphics (xrandr doesn't show the linked displays and also eth over the link breaks down every minute).
I tried what you suggested without success:
Code:
$ sudo dkms autoinstall
Kernel preparation unnecessary for this kernel. Skipping...
Kernel preparation unnecessary for this kernel. Skipping...
Kernel preparation unnecessary for this kernel. Skipping...
Building module:
cleaning build area...
Building module:
cleaning build area...
Building module:
cleaning build area....
.
make KERNELRELEASE=4.2.0-30-generic -d V=1 -C /lib/modules/4.2.0-30-generic/build M=/var/lib/dkms/i915-3.9-3.8/0.02/build...make KERNELRELEASE=4.2.0-30-generic -d V=1 -C /lib/modules/4.2.0-30-generic/build M=/var/lib/dkms/i915-3.4-3.2/0.04/build....
make KERNELRELEASE=4.2.0-30-generic -d V=1 -C /lib/modules/4.2.0-30-generic/build M=/var/lib/dkms/i915-3.15-3.13/0.01/build.....(bad exit status: 2)
(bad exit status: 2)
.(bad exit status: 2)
Error! Bad return status for module build on kernel: 4.2.0-30-generic (x86_64)
Consult /var/lib/dkms/i915-3.15-3.13/0.01/build/make.log for more information.
Error! Bad return status for module build on kernel: 4.2.0-30-generic (x86_64)
Consult /var/lib/dkms/i915-3.9-3.8/0.02/build/make.log for more information.
Error! Bad return status for module build on kernel: 4.2.0-30-generic (x86_64)
Consult /var/lib/dkms/i915-3.4-3.2/0.04/build/make.log for more information.