Ubuntu: Ubuntu won't boot after I installed a Wacom tablet driver


My computer specs: Lenovo ThinkPad X250; dual-boot with Windows and Ubuntu 14.04.5 LTS (GNU/Linux 4.4.0-72-generic x86_64)

What Happened: I recently obtained a Wacom Intuos tablet for work. I plugged it into a USB port and it started working immediately, with no other steps. However, I thought I should install a driver to be safe. I first installed this kernel driver and then this X driver.

When I restarted my computer, GNU GRUB booted normally, but when Ubuntu started, I got the following error:

Error parsing PCC subspaces from PCCT  

This error is followed by a black screen with a white underscore. Other times when I reboot, instead of the error, I just get a blank purple screen. However, I can still start up recovery mode no problem, so I've been working through that to try to fix this.

What I've Tried: First, I tried uninstalling the X driver with the following commands:

sudo apt-get remove xserver-xorg-input-wacom  sudo apt-get purge xserver-xorg-input-wacom  

Then I looked at the dmesg log (/var/log/dmesg), and didn't really find anything useful.

Then I tried blacklisting the kernel modules. I did this by navigating to /etc/modprobe.d/blacklist.conf and adding the following lines:

blacklist wacom  blacklist wacom_w8001  

I skipped the mkinitpcio commands because they do not exist on Ubuntu. I rebooted and this did not solve the problem.

I suspect that I have not successfully uninstalled and/or blacklisted these drivers. Any tips? If I could just get rid of these two drivers I installed and if I am able to boot my Ubuntu that would be perfect.

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