Ubuntu 15.10 + Dell XPS 13 + Dell D3100 Dock

[fightling]

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:

$ 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.

[mlukaszek]

What's in /var/lib/dkms/i915-3.4-3.2/0.04/build/make.log then? Note that it's the i915 module that has problems with recompiling...

Cheers,
Michal

[fightling]

Et voilà!

file attached.

can't even download my own attachment because I'm a Junior Member? m(

[mlukaszek]

/var/lib/dkms/i915-3.4-3.2/0.04/build/include/drm/drmP.h:77:17: fatal error: drm.h: No such file or directory

You need libdrm-dev package (exact name depending on the distribution) to be installed first.

Hope this helps,

Cheers,
Michal

[Maurix]

I also had to modify driver source as follows:

evdi_modeset.c:148

drm_dev_set_unique(dev, dev_name(dev->dev));

evdi_encoder.c:72

status = drm_encoder_init(dev, encoder, &evdi_enc_funcs, DRM_MODE_ENCODER_TMDS, dev_name(dev->dev));