Identifying if the issue is a bug or not
If you aren't sure if you have encountered a software bug in Ubuntu, then you would want to seek help in determining if the issue is a bug or not from here.
If you have confirmed the issue is a bug, please read on.
Determining which type of bug you have
Not all bugs where X seems to be the root cause are in fact an X related bug. Hence, here is documentation on potential root causes:
i855 is Unsupported - Explanation of why i845, i855, i865, etc. chips aren't supported
Glossary - Common error messages and terminology
X Transitions - Explanation for "installing xserver-xorg-core would break existing software"
Reporting a confirmed X bug to Launchpad
Initial filing of the report
First, one will want to familiarize themselves with how to report bugs effectively as per here.
Once this is reviewed, please file a new bug report with Ubuntu via a terminal:
Please ensure you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information.
Including enough information for a developer to work on it
One will want to answer the following questions:
- Does the report include debugging information from the relevant article relating to the reported issue?
- Is this a regression?
- Does this happen in the latest version of Ubuntu?
- Does this happen in the latest version available from upstream?
Non-Graphical Booting - Running X manually, without a display manager (like lightdm, kdm, gdm...)
Wireless Without X - How to get a wireless network connection without X.
Direct Wired Without WAP - How to connect two laptops with direct ethernet cord.
Crashes and Freezes
X Backtracing - How to collect a backtrace for an X crash
Interpreting GPU Dumps - Ringbuffers, batchbuffers, and the meaning of intel_gpu_dump output
Valgrind - Debugging memory leaks
X Bisecting - Using bisection techniques to solve regressions or backport fixes
X/Testing/Touch - Touchscreen and multi-touch testing
Triaging and tagging X bugs
Fixing an X crash