hdmi / dsi 출력 설정에 무언가 영향을 줘서 DSI로 강제 설정되며 HDMI가 꺼지는것으로 추측.
display_default_lcd If a Raspberry Pi DSI LCD is detected it will be used as the default display and will show the framebuffer. Setting display_default_lcd=0 will ensure the LCD is not the default display, which usually implies the HDMI output will be the default. The LCD can still be used by choosing its display number from supported applications, for example, omxplayer.
The Raspberry Pi Touch Display is an LCD display which connects to the Raspberry Pi through the DSI connector. In some situations, it allows for the use of both the HDMI and LCD displays at the same time (this requires software support).
pifm은 FM만 되는데 반해 pitx는 fm, am, ssb, sstv, fsq 와 같이 다양한 모듈레이션을 제공한다고 한다.
PiTx is a software which permit to transmit HF directly through a pin of Raspberry Pi GPIO. Unlike PiFM which transmit only in FM, PiTx is able to perform multi modulation (FM,AM,SSB,SSTV,FSQ) : it has an I/Q input to be agnostic. The demonstration here is done in several steps : – Record an I/Q file from a doorbell transmitter on 434MHZ (first part) – Playing it with the Raspberry Pi using Pitx on HF on same frequency – Listen to the doorbell receiver which recognize the signal
$ cat /etc/rpi-issue Raspberry Pi reference 2020-08-20 Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 9a3a10bf1019ebb2d59053564dc6b90068bad27d, stage2l
혹시나 해서 검색해보는데 흐음...
$ sudo apt-cache search wayland libwayland-bin - wayland compositor infrastructure - binary utilities libwayland-client0 - wayland compositor infrastructure - client library libwayland-cursor0 - wayland compositor infrastructure - cursor library libwayland-dev - wayland compositor infrastructure - development files libwayland-doc - wayland compositor infrastructure - documentation files libwayland-egl-backend-dev - wayland compositor infrastructure - EGL backend development files libwayland-egl1 - wayland compositor infrastructure - EGL library libwayland-egl1-mesa - transitional dummy package libwayland-server0 - wayland compositor infrastructure - server library libweston-5-0 - reference implementation of a wayland compositor (shared libs) libweston-5-dev - reference implementation of a wayland compositor (shared libs) wayland-protocols - wayland compositor protocols weston - reference implementation of a wayland compositor
weston에 줄줄이 비엔나로 깔리는데 한번 시도는 해볼까나?
$ sudo apt-get install weston Reading package lists... Done Building dependency tree Reading state information... Done The following additional packages will be installed: libdrm-amdgpu1 libdrm-common libdrm-nouveau2 libdrm-radeon1 libdrm2 libegl-mesa0 libegl1 libegl1-mesa libevdev2 libgbm1 libgl1-mesa-dri libglapi-mesa libgles2 libglvnd0 libgudev-1.0-0 libinput-bin libinput10 libllvm9 libmtdev1 libsensors-config libsensors5 libwacom-bin libwacom-common libwacom2 libwayland-server0 libweston-5-0 libx11-xcb1 libxcb-composite0 libxcb-dri2-0 libxcb-dri3-0 libxcb-present0 libxcb-shape0 libxcb-sync1 libxcb-xfixes0 libxcb-xkb1 libxshmfence1 Suggested packages: lm-sensors The following NEW packages will be installed: libdrm-amdgpu1 libdrm-common libdrm-nouveau2 libdrm-radeon1 libdrm2 libegl-mesa0 libegl1 libegl1-mesa libevdev2 libgbm1 libgl1-mesa-dri libglapi-mesa libgles2 libglvnd0 libgudev-1.0-0 libinput-bin libinput10 libllvm9 libmtdev1 libsensors-config libsensors5 libwacom-bin libwacom-common libwacom2 libwayland-server0 libweston-5-0 libx11-xcb1 libxcb-composite0 libxcb-dri2-0 libxcb-dri3-0 libxcb-present0 libxcb-shape0 libxcb-sync1 libxcb-xfixes0 libxcb-xkb1 libxshmfence1 weston 0 upgraded, 37 newly installed, 0 to remove and 0 not upgraded. Need to get 21.6 MB of archives. After this operation, 554 MB of additional disk space will be used. Do you want to continue? [Y/n]