Chandra X-Ray Observatory
	(CXC)
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Last modified: 26 October 2016

URL: http://cxc.harvard.edu/chips/bugs/system.html

Bugs: graphic cards & drivers


Table of Contents

Bugs


Bugs

OpenGL Mesa version 6.5.*

Systems using OpenGL Mesa version 6.5.* may experience problems with chips crashing due to a bug in mesa. The problem can occur if chips has been running a while and windows have been created and destroyed. In most cases the problem will be exposed by chips smoke test 3 failing.

The only known workaround is to update to a later version of Mesa (at least 7.0.2). To check your version of mesa run:

unix% glxinfo | grep version

Systems using OpenGL Mesa version 6.5.* may also experience problems when the environment variable LIBGL_ALWAYS_INDIRECT is set or while remote logged into another machine and trying to run chips. Attempts to run chips under these circumstances has caused the xserver to crash. The problem has been observed on FC6 and FC7 machines. The problem no longer exists on FC8 machines running OpenGL Mesa version 7.0.3

ATI graphics cards

Some ATI graphics cards produce the following warning:

libGL warning: 3D driver claims to not support visual 0x4b

This does not seem to have any effect on ChIPS.


Bugs fixed in CIAO 4.8

The following is a list of bugs that were fixed in the CIAO 4.8 software release.

XQuartz 2.7.8

ChIPS now works on OS-X machines which are running version 2.7.8 of XQuartz. The fix means that - on OS-X only - True Type fonts loaded via load_font will not be included in the vector formats (e.g. PS and PDF) created by print_window.

Bugs fixed in CIAO 4.6

The following is a list of bugs that were fixed in the CIAO 4.6 software release.

Flipped plots when using an ATI Gallium driver

Added the ability to specify the renderer used when printing to file. This addresses issues with ATI Gallium drivers flipping plots. A new preference was added called export.printmethod that takes the following values

  • framebuffer (default)
  • xoffscreen
  • none

ATI users with Gallium drivers should use xoffscreen. A none option was added for the worst-case scenario and to help with debugging. However, it is not recommended in general use.


Last modified: 26 October 2016
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