Subsections

21 Possible problems

21.1 ROOT canvas corrupted:

ROOT canvas with updated histograms is corrupted when overlapped with another window. Answer: you have to activate ``BackingStore'' in X11: (see PAW howto) LINUX: It depends which daemon is in charge of putting up the login box on the X-Windows screen, and start the X-Window session at login time. It can be xdm, kdm (provided with the KDE environment) or gdm. If it is xdm or kdm the line starting the X server in the file /usr/lib/X11/xdm/Xservers should not contain the option ``-bs'' it should look something like:

:0 local /usr/X11R6/bin/X +bs

For XFree86 4.0.1, the Screen section of the file /etc/X11/XF86Config (or /etc/X11/XF86Config-4) should be something like:




Section "Screen"
            .
            .
             Option "backingstore"
            .
             .
           EndSection