xdpyinfo | grep RENDER question

[Rick Stevens]

Mark Knecht wrote:
> Rick Stevens wrote:
> 
>>>
>>> Now, running Evolution remotely from Jack2 is fast, but running 
>>> Evolution from Jack1 is slow and I get a message about
>>>
>>> Xlib: extension "RENDER" missing
>>>
>>> so I assume this is part of the problem, but I don't know if it's the 
>>> X11 server on Jack1 (or Wizard?) or something in my ssh setup. (Or 
>>> something else?)
>>>
>>>    Any ideas on how I can get Jack1 to see and use (or make 
>>> available) the RENDER option?
>>
>>
>>
>> That looks like a difference in your sshd configurations or possibly
>> a PATH or other environment setting for user "mark".  Note that you
>> were logged into both Jack1 and Jack2 as "mknecht" when you did the
>> xdpyinfo commands, and you're going into them as user "mark" via the
>> ssh connections.
> 
> 
> Rick,
>    I got an answer to this today. As of openssh 3.8 there is now a new 
> option for 'TrustedX11Forwarding' that allows the local machine to tell 
> the remote machine that it supports the RENDER attribute. I could not 
> find this option in my ssh_config files, but under man ssh ther eis a 
> new option -Y which enables this feature. When I use this option I no 
> longer get the error message
> 
> Xlib: extension "RENDER" missing

Ah!  I LOVE it when they introduce something that isn't backwards
compatible.

> and Evolution is displayed just as fast as it used to be under openssh 
> 3.7.1 without the -Y option.
> 
>    The new command line looks like:
> 
> mknecht at Gentoo2 mknecht $ ssh -X -Y -C -c blowfish -l mark 
> marksmusic.myvnc.comPassword:
> Last login: Mon May  3 12:10:53 2004 from 199.108.40.170
> mark at Wizard mark $
> 
>    Should we possibly update the ssh tunneling page we did to reflect 
> this change as of openssh-3.8?

Absolutely!  You don't even need to ask.  Will you handle it or do you
want me to?
----------------------------------------------------------------------
- Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-      Always remember you're unique, just like everyone else.       -
----------------------------------------------------------------------