Hi,
On 19-09-17 18:41, Matt Porter wrote:
The Chalkboard Electronics HID Touchscreen is classified as
a tablet device by systemd udev because it has BTN_TOOL_PEN
support. It also reports a resolution of 0 for both X and Y
axes in absinfo. This causes libinput to reject it as an
invalid tablet device.
This quirk reclassifies the device as a touchscreen which
allows it to be added as a valid input device.
Signed-off-by: Matt Porter <mpor...@konsulko.com>
Have you considered adding special handling for this device
to the kernel's hid drivers ? The hid subsys has sub drivers
for device specific handling and if the device never actually
has a pen, then the right fix would be to not make the kernel
export this. Note I assume this is for a so called
"smart" whiteboard for in classes ? If that is the case then
the device may actually have a pen/stylus like device in
some configuration. Some of these smart boards have what
are basically empty whiteboard-marker in multiple colors
and the device may report these as different styluses ...
Regards,
Hans
---
udev/90-libinput-model-quirks.hwdb | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/udev/90-libinput-model-quirks.hwdb
b/udev/90-libinput-model-quirks.hwdb
index 72fcdca..6348f0c 100644
--- a/udev/90-libinput-model-quirks.hwdb
+++ b/udev/90-libinput-model-quirks.hwdb
@@ -72,6 +72,13 @@ libinput:name:*ETPS/2 Elantech
Touchpad*:dmi:*svnASUSTeKCOMPUTERINC.:pnX555LAB:*
LIBINPUT_MODEL_TOUCHPAD_VISIBLE_MARKER=1
##########################################
+# Chalkboard Electronics
+##########################################
+libinput:name:Chalkboard Electronics HID Touchscreen:dmi:*
+ ID_INPUT_TABLET=0
+ ID_INPUT_TOUCHSCREEN=1
+
+##########################################
# Chicony
##########################################
# Acer Hawaii Keyboard, uses Chicony VID
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