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Re: X colormap problem when viewed via Microsoft Remote Desktop
- From: Jon Turney <jon dot turney at dronecode dot org dot uk>
- To: cygwin at cygwin dot com
- Cc: Jeff Schenck <schenck at alum dot mit dot edu>
- Date: Mon, 30 Jan 2017 13:54:07 +0000
- Subject: Re: X colormap problem when viewed via Microsoft Remote Desktop
- Authentication-results: sourceware.org; auth=none
- References: <20170129031635.GA2650@anarchy.local>
On 29/01/2017 03:16, email@example.com wrote:
After a fairly recent update of cygwin, I now find that all my X
windows (xterm, emacs, etc.) have color and font problems. Non-x
terminal windows are fine. Windows 7 is running as a VM on an esxi
hypervisor, so I view it remotely with Microsoft Remote Desktop. It
worked well on a previous cygwin release, but I don't have the exact
date when it changed. Also, I don't think the problem is with MRD
because I see it with VNC also.
Thanks for reporting this problem.
"color and font problems" is a bit vague. Can you upload a screenshot
somewhere which illustrates this?
This is unlikely to be a problem with actual X colourmaps unless you are
using antique X clients which use 8 bit visuals.
However, RDP can step down the display colour depth, whereas the colour
depth of an X server root window cannot change, which can cause
dithering to occur.
Additionally, sometimes DirectDraw rendering to RDP doesn't seem to work
properly, for unknown reasons. (This is discussed briefly in )
Since this has started 'recently', I guess it might be related to the
'-compositewm' option being turned on by default .
So, you might try starting the X server with a limited colour depth
(e.g. '-depth 16'), or try the '-engine 1' or '-nocompositewm' options .
Volunteer Cygwin/X X Server maintainer
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