Fixing a Thunderbolt dock/display issue on Dell XPS 1300 in Ubuntu by unlocking Thunderbird

I came into work this morning after taking a week off.

I plugged my notebook into my docking station as usual, but couldn’t get the screens or wired internet to work. When I went to Settings > Display only the built in display was showing rather than the three I have attached to my docking station. I could turn the computer on and off using the button on my docking station.

I did the usual things when the docking station doesn’t work exactly as it should:

  1. Restart the computer
  2. Cold boot the computer (i.e. Read the rest of this entry »

Jumpin’ Flash Jack: Fixing a jumpy touchpad on the Dell XPS 13 9370 (Ubuntu OEM) under 19.04

Touchpads are notoriously jumpy things in Linux.

In my case I was having real trouble with the touchpad. Hitting a key would often (at random intervals) cause the cursor to relocate to wherever the pointer was in the screen. It made any kind of work with the touchpad next to impossible. There are controls for this (including a “disable the touchpad while typing” command), but they didn’t seem to affect performance at all.

Dell has an advice page on fixing this that was developed for the 16.04 LTS Ubuntu (I.e. Read the rest of this entry »


Jumpin’ Flash Jack: Fixing a jumpy touchpad on the Dell XPS 13 9370 (Ubuntu OEM) under 19.04

Touchpads are notoriously jumpy things in Linux.

In my case I was having real trouble with the touchpad. Hitting a key would often (at random intervals) cause the cursor to relocate to wherever the pointer was in the screen. It made any kind of work with the touchpad next to impossible. There are controls for this (including a “disable the touchpad while typing” command), but they didn’t seem to affect performance at all.

Dell has an advice page on fixing this that was developed for the 16.04 LTS Ubuntu (I.e. Read the rest of this entry »


“Have you checked it’s plugged in?” Fixing the touchpad after an Ubuntu update (by turning it on)

After the last Ubuntu update (the last before today’s), I suddenly lost my touchpad. It worked during boot, but not after log in.

I did the usual searching around for people with similar problems (and it seems to be something that comes up, going back years—which can be a problem, since Ubuntu has gone through some pretty fundamental changes in how it handles devices over the last few years). I followed the advice at the Ubuntu debugging page. Running cat /proc/bus/input/devices showed that there was a touchpad being detected (though not a synaptics touchpad as all the examples seem to be):

I: Bus=0018 Vendor=06cb Product=76af Version=0100
N: Name="DELL07E6:00 06CB:76AF Touchpad"
P: Phys=i2c-DELL07E6:00
S: Sysfs=/devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-1/i2c-DELL07E6:00/0018:06CB:76AF.0001/input/input12
U: Uniq=
H: Handlers=mouse0 event9 
B: PROP=5
B: EV=1b
B: KEY=e520 10000 0 0 0 0
B: ABS=260800000000003
B: MSC=20

On that page I read that some ti Read the rest of this entry »


Fixing sensitive mouse on Dell XPS 13 9370 “Developer Edition” (i.e. Ubuntu 18.04 OEM)

I was having trouble with the mouse being too sensitive on my touchpad. After googling around I found this Dell page. I’ve followed the instructions (it was last updated Feb 2019), with the following changes and modifications:

  1. substituting 18.04 for 16.04 in all kernal and file names (e.g. in Step 3);
  2. substituting 51- for * in Step 5 iii in the file name sudo gedit /usr/share/x11/xorg.conf. Read the rest of this entry »

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