Resistive touchscreen overlay under the bezel (timmotools)
A 4.3-inch resistive digitizer on a USB touch controller fits under the stock bezel with two printed spacers — a working touchscreen without cutting the case.
What it takes
- Soldering
- Disassembly
- 3D print
- Purchase required
- Config change
Difficulty 3 of 3 — advanced.
Details
timmotools' 2026 build: a 117 × 70 mm four-wire resistive panel on a USB resistive touch controller, ribbon extended and the controller's four USB wires soldered to the AIO v2's USB, powered with aiov2_ctl usb on. Two printed parts (Screen_spacer.stl and Trackball_Spacer.stl) hold the digitizer so the faceplate cannot crush it and route the cables; the assembly uses six 8 mm M4 button-head bolts. The display itself is untouched.
Calibration is a LIBINPUT_CALIBRATION_MATRIX udev rule, or the same matrix in ~/.config/labwc/rc.xml on newer images. Built on a CM5 with the AIO v2 and 'should work with CM4 or standard expansion board as long as you can solder to the USB pins'; a stylus works best. Telespalla is writing a NixOS module for it.
Links
Open at Forum thread- GitHubRepository
Related mods
uConsoles shipped since 2025 carry a third panel revision (TXW500242B0) that older OS images cannot drive; Rex's kernel 6.12.67 images support all three.
The panel is portrait-native, so SDDM and some apps come up sideways; an xrandr line in Xsetup or Xsession.d puts them right on X11.
Tempered-glass protectors for the Blackmagic Pocket Cinema Camera 6K (SmallRig 3274 and similar) are a near-perfect fit for the 120 × 65 mm screen.
The micro-HDMI port drives a monitor or a Nexdock lapdock; ARandR (xrandr) makes it the primary screen, and the CM4 lists modes up to 3840 × 2160 at 30 Hz.
A simple clip-on cover that prints flat with no supports and keeps about 0.5 mm off the glass — for throwing the console in a bag.
A front cover on a 2 mm carbon-fibre rod hinge with a magnet catch, printed in clear resin so you can peek at the screen; about $10 to have made.