Commit ec4054f0 authored by Eli Zaretskii's avatar Eli Zaretskii

Document the use of -xrm to start EMacs in synchronous mode.

parent 091f8878
......@@ -249,6 +249,15 @@ mode, where each Xlib call checks for errors before it returns. This
mode is much slower, but when you get an error, you will see exactly
which call really caused the error.
You can start Emacs in a synchronous mode by invoking it with the -xrm
option, like this:
emacs -rm "emacs.synchronous: true"
Setting a breakpoint in the function `x_error_quitter' and looking at
the backtrace when Emacs stops inside that function will show what
code causes the X protocol errors.
** If the symptom of the bug is that Emacs fails to respond
Don't assume Emacs is `hung'--it may instead be in an infinite loop.
......
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