Missing charsets in String to FontSet conversion

[Ryan Johnson]

  On 8/3/2010 3:35 PM, Jon TURNEY wrote:
> On 03/08/2010 10:00, Thomas Dickey wrote:
>> On Tue, 3 Aug 2010, Ryan Johnson wrote:
>>> At some point an annoyance appeared with my xterm windows: The first 
>>> time I
>>> use [ctrl]+mouse click in any window, that xterm becomes 
>>> unresponsive for
>>> about 5 seconds with the CPU pegged to 100%. After the five seconds 
>>> is up,
>>> whatever shell spawned the xterm receives the following message:
>>>> Warning: Missing charsets in String to FontSet conversion
>>>
>>> After that all works normally (until I open the next xterm window).
>>>
>>> Is there a way to diagnose what the problem is? I don't know what 
>>> FontSet
>>> string the error even refers to, let alone which parts of that 
>>> string were
>>> invalid. In any case, it really shouldn't take five seconds of hard CPU
>>> crunching to detect and report an invalid input string.
>
> There's some more discussion at
> http://sourceware.org/bugzilla/show_bug.cgi?id=10948
>
> Installing the fonts font-isas-misc, font-jis-misc and 
> font-daewoo-misc should also work around the problem, which can also 
> be seen with other applications, as that ensures that at least one 
> font exists for every charset.
>
> I agree that the error message sucks and should tell you the charsets 
> which are missing and what string it was attempting to convert.
>
>> This topic came up last year, iirc the issue was this:
>>
>> http://invisible-island.net/xterm/xterm.faq.html#slow_menus
The xterm FAQ's workaround (setting LANG=C) indeed works, but then I 
lose all of UTF-8, including some of the punctuation marks man pages and 
gcc errors like to use.

As I mentioned before, I'd seen references to those fonts but wasn't 
sure it would actually help me. I just installed them and, sure enough, 
there's still some (fewer?) missing charsets.

The delay dropped to only 2-3 seconds now though, so I guess that helps. 
Is there a way to diagnose which fonts/charsets are still missing?

Regards,
Ryan


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