Troubleshooting
2841
Comment:
|
4732
Initial consolidation of X/Debugging et. al. into X/Troubleshooting.
|
Deletions are marked like this. | Additions are marked like this. |
Line 2: | Line 2: |
For hard bugs the analysis phase is the most important, and most challenging part of bug work. Depending on how the bug is behaving, there are multiple directions to investigate the issue. Here's some different approaches: | ||<tablestyle="float:right; background: #FFFFFF; margin: 0 0 1em 1em;" style="padding:2.0em;"> {{https://launchpadlibrarian.net/10142846/xswat-192.png}} || ||<tablestyle="float:right; font-size: 0.9em; width:40%; background:#F1F1ED; margin: 0 0 1em 1em;" style="padding:0.5em;"><<TableOfContents>>|| |
Line 4: | Line 5: |
=== Common Problems === General Issues * [[X/Glossary|Glossary]] - Common error messages and terminology * [[X/Troubleshooting/HighCPU|High CPU issues]] * [[DebuggingKernelSuspend|Suspend and Resume issues]] * [[X/Troubleshooting/XError|Program received an X Window System error]] * [[X/Bugs/Transitions|X Transitions]] - Explanation for "installing xserver-xorg-core would break existing software" |
= Identifying if the issue is a bug or not = |
Line 12: | Line 7: |
Display Issues * [[X/Troubleshooting/VideoDriverDetection|Video driver detection]] * [[X/MonitorDetection|Monitor detection]] * [[X/Troubleshooting/Resolution|Resolution detection]] * [[X/Troubleshooting/Freeze|Freeze issues]] * [[Kernel/Debugging/Backlight|Backlight issues]] * [[X/Troubleshooting/BlankScreen|Blank Screen on startup issues]] * [[X/Troubleshooting/HugeFonts|Fonts displayed way too big]] * [[X/Troubleshooting/IntelPerformance|Intel graphics performance issues]] * [[X/i8xxUnsupported|i855 is Unsupported]] - Explanation of why i845, i855, i865, etc. chips aren't supported * [[X/HybridGraphics|Hybrid Graphics is Unsupported]] - Not officially supported, but the community has workarounds |
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 [[https://help.ubuntu.com/community/ReportingBugs|here]]. |
Line 24: | Line 9: |
Input Issues * [[X/Troubleshooting/HalBreaksKeyboardAndMouse|Keyboard and mouse quit working]] * [[Hotkeys/Troubleshooting|Multimedia hotkey problems]] * [[DebuggingKeyboardDetection|Keyboard detection]] * [[DebuggingTouchpadDetection|Touchpad detection]] |
If you have confirmed the issue is a bug, please read on. |
Line 30: | Line 11: |
=== Troubleshooting Techniques === | = 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: |
Line 34: | Line 18: |
* [[X/NonGraphicalBoot|Non-Graphical Booting]] - Running X manually, without gdm | Display Issues * [[X/Troubleshooting/3D|3D / GLX corruption and other issues]] * [[Kernel/Debugging/Backlight|Backlight issues]] * [[X/Troubleshooting/BlankScreen|Blank Screen on startup issues]] * [[X/i8xxUnsupported|i855 is Unsupported]] - Explanation of why i845, i855, i865, etc. chips aren't supported * [[X/Troubleshooting/HugeFonts|Fonts displayed way too big]] * [[X/Troubleshooting/Freeze|Freeze issues]] * [[X/Troubleshooting/IntelPerformance|Intel graphics performance issues]] * [[X/MonitorDetection|Monitor detection]] * [[X/Troubleshooting/Resolution|Resolution detection]] * [[X/Troubleshooting/VideoDriverDetection|Video driver detection]] General Issues * [[X/Glossary|Glossary]] - Common error messages and terminology * [[X/Troubleshooting/HighCPU|High CPU usage issues]] * [[X/Troubleshooting/HighMemory|High memory usage issues]] * [[X/Bugs/Transitions|X Transitions]] - Explanation for "installing xserver-xorg-core would break existing software" * [[X/Troubleshooting/XError|Program received an X Window System error]] * [[DebuggingKernelSuspend|Suspend and Resume issues]] Input Issues * [[DebuggingKeyboardDetection|Keyboard detection]] * [[Hotkeys/Troubleshooting|Multimedia hotkey problems]] * [[DebuggingTouchpadDetection|Touchpad detection]] = 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 [[https://wiki.ubuntu.com/ReportingBugs|here]]. Once this is reviewed, please file a new bug report with Ubuntu via a terminal: {{{ ubuntu-bug xorg }}} 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? = Debugging techniques = * [[X/NonGraphicalBoot|Non-Graphical Booting]] - Running X manually, without a display manager (like lightdm, kdm, gdm...) |
Line 38: | Line 69: |
Crashes and Freezes | Crashes and Freezes |
Line 40: | Line 71: |
* [[X/FixingCrashes|X Crash Fixing]] - How to fix X crashes | |
Line 45: | Line 75: |
* [[X/Dev/DeviceTreeHWDetection|Device Tree]] | |
Line 47: | Line 78: |
* [[X/Quirks|X Quirks]] - Fixes for some common hardware-specific issues * [[X/Dev/DeviceTreeHWDetection|Device Tree]] |
= Triaging and tagging X bugs = Please see [[https://wiki.ubuntu.com/X/Triaging|here]] for more on triaging X bugs, and [[https://wiki.ubuntu.com/X/Tagging|here]] for tagging. = Fixing an X crash = * For more on this, please see [[https://wiki.ubuntu.com/X/FixingCrashes|here]]. * [[X/Quirks|X Quirks]] - Fixes for some common hardware-specific issues. = Other Resources = * [[https://help.ubuntu.com/community/Video|Video Resources]] at help.ubuntu.com * For installing [[https://help.ubuntu.com/community/BinaryDriverHowto/AMD|fglrx]] or [[https://help.ubuntu.com/community/BinaryDriverHowto/Nvidia|nvidia]] proprietary drivers. |
|
Contents |
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:
Booting
Display Issues
i855 is Unsupported - Explanation of why i845, i855, i865, etc. chips aren't supported
General Issues
Glossary - Common error messages and terminology
X Transitions - Explanation for "installing xserver-xorg-core would break existing software"
Input Issues
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:
ubuntu-bug xorg
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?
Debugging techniques
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
Other Techniques
X Bisecting - Using bisection techniques to solve regressions or backport fixes
X/Testing/Touch - Touchscreen and multi-touch testing
Triaging and tagging X bugs
Please see here for more on triaging X bugs, and here for tagging.
Fixing an X crash
Other Resources
Video Resources at help.ubuntu.com
X/Troubleshooting (last edited 2017-11-18 18:25:00 by penalvch)