View source for Template:DebianBullseyeDesktop-XFCE-WithHDMI

===WiFi Connection===
====Gui====
Click on the icon on the top right in the Debian's main window, select your wanted WiFi hotspot and proceed with prompts
====Console====
Please visit: [[Use NetworkManager to configure network settings]]

===Cancel auto-login===
Edit file:
<syntaxhighlight lang="bash">
sudo vim /etc/lightdm/lightdm.conf
</syntaxhighlight>
Comment out the following two lines (insert # in front of them):
<syntaxhighlight lang="bash">
autologin-user=pi
autologin-user-timeout=0
</syntaxhighlight>

===Test OpenGL ES===
You can test it by clicking on the Terminator icon to start a commandline utility in the System Tools and run the following commands:
<syntaxhighlight lang="bash">
glmark2-es2
</syntaxhighlight>

===HDMI/DP LCD Resolution===
Open the system's menu and go to Settings -> Display to customize your settings.<br />

===HiDPI and display scaling===
Xfce supports HiDPI scaling which can be enabled using the settings manager: Go to Settings Manager > Appearance > Settings > Window Scaling and select 2 as the scaling factor.<br />
Or Edit this file: ~/.config/xfce4/xfconf/xfce-perchannel-xml/xsettings.xml

===Adjust HDMI overscan ===
Open the command line terminal and enter the command to operate, Note:<br />
1) You need to login to the desktop;<br />
2) If you are using ssh terminal, please use the same username as the desktop login. The default is pi. You cannot use the root user. you also need to assign the DISPLAY variable:<br />
<syntaxhighlight lang="bash">
export DISPLAY=:0.0
</syntaxhighlight>
====Query which resolutions the display supports====
<syntaxhighlight lang="bash">
xrandr -q
</syntaxhighlight>
====Set resolution====
For example set to 1920X1080@60Hz: 
<syntaxhighlight lang="bash">
xrandr --output HDMI-1 --mode 1920x1080 --refresh 60
</syntaxhighlight>
====Adjust the HDMI overscan====
For example, the transformation scaling horizontal coordinates by 0.8, vertical coordinates by 1.04 and moving the screen by 35 pixels right and 19 pixels down: 
<syntaxhighlight lang="bash">
xrandr --output HDMI-1 --transform 0.80,0,-35,0,1.04,-19,0,0,1
</syntaxhighlight>
====Automatic adjustment at boot====
Edit ~/.config/autostart/lxrandr-autostart.desktop，Write the full xrandr command to the key at the beginning of "Exec= as shown below：
<syntaxhighlight lang="bash">
[Desktop Entry]
Type=Application
Name=LXRandR autostart
Comment=Start xrandr with settings done in LXRandR
Exec=sh -c 'xrandr --output HDMI-1 --mode 1920x1080 --refresh 50 --transform 1.04,0,-35,0,1.05,-30,0,0,1'
</syntaxhighlight>

===Chromium web browser ===
====GPU====
Chromium web browser has enabled hardware acceleration by default, supports WebGL, and can view hardware acceleration details by entering the URL chrome://gpu, as shown below:<br />
[[File:rk35xx-debian-chromium-gpu.png|frameless|400px]]
====VPU====
Play a video in the browser, then use fuser on the command line to view the mpp device node to confirm that the vpu interface is being called:
<syntaxhighlight lang="bash">
pi@FriendlyElec:~$ fuser /dev/mpp_service
/dev/mpp_service:     3258
</syntaxhighlight>
If there is no content output from the fuser command, it means software decoding.

===Test hardware encoding===
<syntaxhighlight lang="bash">
mpi_enc_test -w 1920 -h 1080 -t 7 -f 0 -o test.h264 -n 300
export XDG_RUNTIME_DIR=/run/user/0
ffplay test.h264
</syntaxhighlight>

====Check Supported Hardware Decoding Formats====
Enter about://gpu in your browser's address bar and scroll to the bottom of the page to view the "Video Acceleration Information" table. <br />
After playing a video, enter about://media-internals in your browser's address bar to check if hardware decoding was enabled for the most recent playback. <br />