chromium is‘t full screen

/usr/sbin/lightdm
\_ /usr/bin/X :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
\_ lightdm --session-child 13 16
    \_ /usr/bin/lxsession -s LXDE -e LXDE
        \_ /usr/bin/unclutter -idle 1 -root
        \_ /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session x-session-manager
        \_ openbox --config-file /home/pi/.config/openbox/lxde-rc.xml
        \_ lxpolkit
        \_ lxpanel --profile LXDE-pi
        \_ pcmanfm --desktop --profile LXDE-pi
        \_ xscreensaver -no-splash

\_ /usr/lib/chromium-browser/chrome-sandbox /usr/lib/chromium-browser/chromium-browser --type=zygote --user-data-dir=/tmp
|   \_ chromium-browser --type=zygote --user-data-dir=/tmp                          
|       \_ chromium-browser --type=zygote --user-data-dir=/tmp                          
 |           \_ /usr/lib/chromium-browser/chromium-browser --type=r                          
\_ chromium-browser --type=gpu-process --channel=30466.0.23259935 --user-data-dir=/tmp --supports-dual-gpus=false --gpu-driver-bu        

./cat_fb.sh &&sz fb0.bmp 

尝试直接将 chromium F11 全屏,无效。

$xdotool key F11

尝试设置chromium 窗口大小。

$xdotool search chromium-browser
$xdotool getwindowname 31457281
$xdotool windowsize  31457281 480 800

直接杀死chromium 窗口确定这里灰边为桌面背景。

$xdotool windowkill  29360131 

直接启动chromium也确定未全屏。

$chromium-browser --start-maximized &

原来，chromium 有一个kiosk-mode专门用以全屏模式，尝试任然无效，所以推测很有可能是桌面环境设置的问题。

对比了正常和异常的桌面环境配置~/.config对比，找到了/home/pi/.config/lxsession/LXDE/desktop.conf 不一致，同时也验证了窗口管理器openbox 未启动。

window_manager=openbox-lxde
windows_manager/command=openbox
windows_manager/session=LXDE

~/.config/lxsession/LXDE/desktop.conf 文件是来自于/etc/xdg/lxsession/LXDE/desktop.conf 拷贝。通过~/.cache/lxsession/LXDE/run.log 日志可以确定。

 Message: utils.vala:79: Config system location : /etc/xdg/lxsession/LXDE
 Message: utils.vala:85: System system path location : /etc/xdg/lxsession/LXDE/desktop.conf
 Message: utils.vala:89: Final file used : /etc/xdg/lxsession/LXDE/desktop.conf
 Message: settings.vala:527: Key file does not have key 'iGtk/ColorScheme'

 (lxsession:6879): WARNING **: settings.vala:889: Failed to create file '/etc/xdg/lxsession/LXDE/desktop.conf.LQE0UZ': Permission denied