我已经将 Qt（带有交叉编译器）从 Ubuntu VM 构建到 Raspbian（Raspberry pi 模型 3 B+），因此它可以通过 ssh 部署应用程序。
Qt配置：
Building on: linux-g++ (x86_64, CPU features: mmx sse sse2)
Building for: devices/linux-rasp-pi3-vc4-g++ (arm, CPU features: neon)
Target compiler: gcc 7.5.0
Configuration: cross_compile compile_examples enable_new_dtags largefile neon precompile_header shared shared rpath release c++11 c++14 c++1z concurrent dbus reduce_exports stl
Build options:
Mode ................................... release
Optimize release build for size ........ no
Building shared libraries .............. yes
Using C standard ....................... C11
Using C++ standard ..................... C++17
Using ccache ........................... no
Using new DTAGS ........................ yes
Relocatable ............................ yes
Using precompiled headers .............. yes
Using LTCG ............................. no
Target compiler supports:
NEON ................................. yes
Build parts ............................ libs
Qt modules and options:
Qt Concurrent .......................... yes
Qt D-Bus ............................... yes
Qt D-Bus directly linked to libdbus .... yes
Qt Gui ................................. yes
Qt Network ............................. yes
Qt Sql ................................. yes
Qt Testlib ............................. yes
Qt Widgets ............................. yes
Qt Xml ................................. yes
Support enabled for:
Using pkg-config ....................... yes
udev ................................... yes
Using system zlib ...................... yes
Zstandard support ...................... no
Qt Core:
DoubleConversion ....................... yes
Using system DoubleConversion ........ yes
GLib ................................... yes
iconv .................................. no
ICU .................................... yes
Built-in copy of the MIME database ..... yes
Tracing backend ........................ <none>
Logging backends:
journald ............................. no
syslog ............................... no
slog2 ................................ no
PCRE2 .................................. yes
Using system PCRE2 ................... yes
Qt Network:
getifaddrs() ........................... yes
IPv6 ifname ............................ yes
libproxy ............................... no
Linux AF_NETLINK ....................... yes
OpenSSL ................................ yes
Qt directly linked to OpenSSL ........ no
OpenSSL 1.1 ............................ yes
DTLS ................................... yes
OCSP-stapling .......................... yes
SCTP ................................... no
Use system proxies ..................... yes
GSSAPI ................................. no
Qt Gui:
Accessibility .......................... yes
FreeType ............................... yes
Using system FreeType ................ yes
HarfBuzz ............................... yes
Using system HarfBuzz ................ yes
Fontconfig ............................. yes
Image formats:
GIF .................................. yes
ICO .................................. yes
JPEG ................................. yes
Using system libjpeg ............... yes
PNG .................................. yes
Using system libpng ................ yes
Text formats:
HtmlParser ........................... yes
CssParser ............................ yes
OdfWriter ............................ yes
MarkdownReader ....................... yes
Using system libmd4c ............... no
MarkdownWriter ....................... yes
EGL .................................... yes
OpenVG ................................. no
OpenGL:
Desktop OpenGL ....................... no
OpenGL ES 2.0 ........................ yes
OpenGL ES 3.0 ........................ yes
OpenGL ES 3.1 ........................ yes
OpenGL ES 3.2 ........................ yes
Vulkan ................................. yes
Session Management ..................... yes
Features used by QPA backends:
evdev .................................. yes
libinput ............................... yes
INTEGRITY HID .......................... no
mtdev .................................. yes
tslib .................................. yes
xkbcommon .............................. yes
X11 specific:
XLib ................................. yes
XCB Xlib ............................. yes
EGL on X11 ........................... yes
QPA backends:
DirectFB ............................... no
EGLFS .................................. yes
EGLFS details:
EGLFS OpenWFD ........................ no
EGLFS i.Mx6 .......................... no
EGLFS i.Mx6 Wayland .................. no
EGLFS RCAR ........................... no
EGLFS EGLDevice ...................... yes
EGLFS GBM ............................ yes
EGLFS VSP2 ........................... no
EGLFS Mali ........................... no
EGLFS Raspberry Pi ................... no
EGLFS X11 ............................ yes
LinuxFB ................................ yes
VNC .................................... yes
XCB:
Using system-provided XCB libraries .. yes
XCB XKB .............................. yes
XCB XInput ........................... yes
Native painting (experimental) ....... no
GL integrations:
GLX Plugin ......................... no
EGL-X11 Plugin ..................... yes
Qt Sql:
SQL item models ........................ yes
Qt Widgets:
GTK+ ................................... no
Styles ................................. Fusion Windows
Qt PrintSupport:
CUPS ................................... no
Qt Sql Drivers:
DB2 (IBM) .............................. no
InterBase .............................. no
MySql .................................. no
OCI (Oracle) ........................... no
ODBC ................................... no
PostgreSQL ............................. yes
SQLite2 ................................ yes
SQLite ................................. yes
Using system provided SQLite ......... no
TDS (Sybase) ........................... yes
Qt Testlib:
Tester for item models ................. yes
Serial Port:
ntddmodm ............................... no
Qt SerialBus:
Socket CAN ............................. yes
Socket CAN FD .......................... yes
SerialPort Support ..................... yes
Further Image Formats:
JasPer ................................. no
MNG .................................... no
TIFF ................................... yes
Using system libtiff ................. no
WEBP ................................... yes
Using system libwebp ................. yes
Qt QML:
QML network support .................... yes
QML debugging and profiling support .... yes
QML just-in-time compiler .............. yes
QML sequence object .................... yes
QML XML http request ................... yes
QML Locale ............................. yes
Qt QML Models:
QML list model ......................... yes
QML delegate model ..................... yes
Qt Quick:
Direct3D 12 ............................ no
AnimatedImage item ..................... yes
Canvas item ............................ yes
Support for Qt Quick Designer .......... yes
Flipable item .......................... yes
GridView item .......................... yes
ListView item .......................... yes
TableView item ......................... yes
Path support ........................... yes
PathView item .......................... yes
Positioner items ....................... yes
Repeater item .......................... yes
ShaderEffect item ...................... yes
Sprite item ............................ yes
QtQuick3D:
Assimp ................................. yes
System Assimp .......................... no
Qt Scxml:
ECMAScript data model for QtScxml ...... yes
Qt Gamepad:
SDL2 ................................... no
Qt 3D:
Assimp ................................. yes
System Assimp .......................... no
Output Qt3D Job traces ................. no
Output Qt3D GL traces .................. no
Use SSE2 instructions .................. no
Use AVX2 instructions .................. no
Aspects:
Render aspect ........................ yes
Input aspect ......................... yes
Logic aspect ......................... yes
Animation aspect ..................... yes
Extras aspect ........................ yes
Qt 3D Renderers:
OpenGL Renderer ........................ yes
Qt 3D GeometryLoaders:
Autodesk FBX ........................... no
Qt Bluetooth:
BlueZ .................................. no
BlueZ Low Energy ....................... no
Linux Crypto API ....................... no
Native Win32 Bluetooth ................. no
WinRT Bluetooth API (desktop & UWP) .... no
WinRT advanced bluetooth low energy API (desktop & UWP) . no
Qt Sensors:
sensorfw ............................... no
Qt Quick Controls 2:
Styles ................................. Default Fusion Imagine Material Universal
Qt Quick Templates 2:
Hover support .......................... yes
Multi-touch support .................... yes
Qt Positioning:
Gypsy GPS Daemon ....................... no
WinRT Geolocation API .................. no
Qt Location:
Qt.labs.location experimental QML plugin . yes
Geoservice plugins:
OpenStreetMap ........................ yes
HERE ................................. yes
Esri ................................. yes
Mapbox ............................... yes
MapboxGL ............................. yes
Itemsoverlay ......................... yes
QtXmlPatterns:
XML schema support ..................... yes
Qt Multimedia:
ALSA ................................... yes
GStreamer 1.0 .......................... yes
GStreamer 0.10 ......................... no
Video for Linux ........................ yes
OpenAL ................................. no
PulseAudio ............................. yes
Resource Policy (libresourceqt5) ....... no
Windows Audio Services ................. no
DirectShow ............................. no
Windows Media Foundation ............... no
Qt TextToSpeech:
Flite .................................. no
Flite with ALSA ........................ no
Speech Dispatcher ...................... no
Qt Tools:
QDoc ................................... no
Qt WebEngine Build Tools:
Use System Ninja ....................... no
Use System Gn .......................... no
Jumbo Build Merge Limit ................ 8
Developer build ........................ no
QtWebEngine required system libraries:
fontconfig ........................... yes
dbus ................................. yes
nss .................................. yes
khr .................................. yes
glibc ................................ yes
QtWebEngine required system libraries for qpa-xcb:
x11 .................................. no
libdrm ............................... yes
xcomposite ........................... no
xcursor .............................. no
xi ................................... no
xtst ................................. no
Optional system libraries used:
re2 .................................. yes
icu .................................. no
libwebp, libwebpmux and libwebpdemux . yes
opus ................................. yes
ffmpeg ............................... no
libvpx ............................... no
snappy ............................... yes
glib ................................. yes
zlib ................................. yes
minizip .............................. yes
libevent ............................. yes
jsoncpp .............................. yes
protobuf ............................. no
libxml2 and libxslt .................. yes
lcms2 ................................ yes
png .................................. yes
JPEG ................................. yes
harfbuzz ............................. yes
freetype ............................. yes
我可以构建项目并获取可执行的应用程序文件（如果我将其复制到 Raspberry - 它会起作用）：
ELF 32 位 LSB 可执行文件，ARM，EABI5 版本 1 (GNU/Linux)，动态链接，解释器 /lib/ld-linux-armhf.so.3，适用于 GNU/Linux 3.2.0，BuildID[sha1]=ac6935ff94eece0310f25438693924ca374e77e3，带有 debug_info，未剥离
但是，当我尝试远程运行它./test_app，或者使用 Qt 创建者的 ssh 连接部署它时，我的 Raspberry 上出现错误：Could not find DRM device! Aborted
所以我有两个问题：
- 如果我手动运行我的应用程序（我尝试使用不同的库构建/运行不同的应用程序）并且通过 ssh 运行它时无法运行，为什么我的应用程序可以工作？
- 是什么原因？我已经阅读了很多文章，但仍然不明白它与“DRM 设备”有什么关系（DRM - 数字版权管理，如果我理解正确的话）
关于我的问题有很多问题（自 2017 年以来），但直到现在都没有解决。