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2026-09-06T06:04:48Z

Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex

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'''Documentation notice:''' This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

== Summary ==
Technical overview of the Waveshare 7.9-inch capacitive touchscreen with an IPS panel (400×1280) connected via the Raspberry Pi's DSI interface.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL22293 WSAL22293 – 7.9inch Capacitive Touch Display for Raspberry Pi, 400×1280, IPS, DSI Interface]

== Technical overview ==
* The display uses an IPS panel with a 400×1280 resolution and is driven directly through the Raspberry Pi's DSI interface at up to 60 Hz refresh rate.
* It features a five-point capacitive touch panel made of toughened glass rated up to 6H hardness.
* Compatible with Raspberry Pi models Pi5/CM5/CM4/CM3+/CM3 and Pi4B/3B+/3B/3A+, using either a 12 cm DSI cable or a 15-pin FPC cable depending on the board.
* Operating voltage is 5 V with a minimum current requirement of 0.6 A; operating temperature range is 0–60 °C and storage range is -10–70 °C.
* For Bookworm/Bullseye, a dtoverlay line for the Waveshare panel is added to config.txt; for Buster, the driver can be installed manually or a pre-installed image can be flashed.
* Display and touch rotation are configured differently per system: via GUI settings on Trixie/Bookworm, via config.txt on Bullseye/Buster, or via cmdline.txt on the lite version.
* Screen power can be toggled with wlr-randr under Labwc/Wayfire, while xset dpms force off handles sleep mode under X11.
* Touch input can be disabled by adding disable_touchscreen=1 to the end of config.txt; the change takes effect after a reboot.

'''Commands and examples – verify before use:'''
<syntaxhighlight lang="text">
dtoverlay=vc4-kms-dsi-waveshare-panel,7_9_inch
git clone https://github.com/waveshare/Waveshare-DSI-LCD
sudo bash ./WS_xinchDSI_MAIN.sh 79 I2C0
sudo reboot
dtoverlay=WS_xinchDSI_Screen,SCREEN_type=5,I2C_bus=10
dtoverlay=WS_xinchDSI_Touch,invertedx,swappedxy,I2C_bus=10
wlr-randr --output DSI-2 --off
wlr-randr --output DSI-2 --on
xset dpms force off
disable_touchscreen=1
</syntaxhighlight>

== Notes and version constraints ==
* The correct DSI interface (DSI0 or DSI1) must be selected per board; DSI1 is the default.
* Before flashing a pre-installed image, the SD card should be formatted and the correct kernel/architecture path (32-bit or 64-bit) identified.
* After a system update on Buster, previously installed driver files may be overwritten; reinstalling the driver may be necessary.
* When switching motherboard platforms (e.g., from Pi4B to Pi3B+), the appropriate drivers must be reinstalled because Pi4 and Pi3 load different driver files.
* Synchronized display-and-touch rotation is supported only on Trixie/Bookworm; on Bullseye/Buster, touch rotation must be set manually in config.txt.
* Screen control commands apply only to specific graphical environments (Labwc/Wayfire vs. X11); the output name (DSI-1/DSI-2/HDMI-A-1) must match the actual display in use.
* All changes to config.txt or cmdline.txt require a reboot to take effect.

== Source and revision record ==
* [https://www.waveshare.com/wiki/7.9inch_DSI_LCD 7.9inch DSI LCD - Waveshare Wiki]
* Source revision: 105331
* Captured: 2026-09-03T03:46:34+00:00
* SHA-256: <code>7eaaa44fb6f3f2912b6eacabc1d15c245b04a46b6081797b6154e34692c22916</code>

WSAL22293 – 7.9inch DSI LCD/en - Versionsgeschichte

JWTechPublisher: Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex