Re: [DIGImend-users] Issues with DKMS deb package upon Ubuntu upgrade

[Nikolai K. <sp...@gm...>]

Hi Caleb,

On 07/15/2016 07:16 AM, Caleb Langeslag wrote:
> So a friend recently acquired a Huion GT-190.

We don't have information on that tablet. Could you send "lsusb -v" output for
the start? Thank you.

> Plugged it in, installed the latest DIGImend DKMS deb package on Ubuntu
> 15.10, and it worked perfectly.  Later on, just recently upgraded to Ubuntu
> 16.04, and now the tablet does not function whatsoever. It's plugged in and
> shows up under lsusb, but is not listed under 'xinput --list'.

This is interesting.

> Next, I grabbed the graphics tablet and plugged it into another desktop,
> with a fresh clean Ubuntu 16.04 installation (no upgrade), and installed the
> DIGImend drivers, and it works perfectly fine on there.
>
> I'm wondering if there's a packaging issue with the deb package, when
> dealing with OS version upgrades, or if it's some bug in Canonical's work.
>
> On the other desktop (that was upgraded from 15.10), I tried uninstalling
> the package, restarting, reinstalling the package, restarting, and no
> resulting difference. Also tried "Mark for complete removal" under Synaptic
> for the 'digimend-dkms' package, and reinstalling after. I've also tried
> rmmod to unload the kernel module (hid_uclogic), and insmod to manually load
> the the module for the current kernel version, with no change.
>
> On both computers, I can run lsmod and see hid_uclogic loaded.
>
> When I run 'watch -n 0.5 xinput --list' on both computers, and plug in the tablet, I get the results of:
>
>     - On the upgraded 16.04 computer: "NUVOTON WPM USB" appears for a second, then disappears. Nothing else comes up thereafter.
>     - On the cleanly installed 16.04 computer: "NUVOTON WPM USB" appears for a second, disappears, then the Tablet Monitor Pen/Mouse/Consumer-Control items appear and stay.
>
> If there's any further information required, then feel free to ask.

Alright, can you send the output of "/sbin/modinfo hid-uclogic" from both
machines? I suspect that the driver won't even build on 16.04, as it has the
4.4 kernel with HID driver interface changed slightly, introducing
incompatibility.

You can try building and installing the latest development version manually
from https://github.com/DIGImend/digimend-kernel-drivers/archive/master.zip

Nick