Troubleshooting

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#start
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=== Common Problems ===
 * [[X/Glossary]] - Common error messages and terminology
 * [[X/Bugs/Transitions|X Transitions]] - Explanation for "installing xserver-xorg-core would break existing software"
 * [[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
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 * [[X/Troubleshooting/FglrxInteferesWithRadeonDriver|Switching between -fglrx and -ati drivers]]
 * [[X/Troubleshooting/NvidiaDriverSwitching|Switching between -nvidia and -nouveau drivers]]
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== Troubleshooting Kernel Modesetting Issues ==

The {{{drm.debug=0x04}}} kernel option can be used to get additional debugging data included in your {{{dmesg}}} output.
=== Troubleshooting Techniques ===
 * [[X/Backtracing|X Backtracing]] - How to collect a backtrace for an X crash
 * [[X/Bisecting]] - Using bisection techniques to solve regressions or backport fixes
 * [[X/Testing/Touch]] - Touchscreen and multi-touch testing
 * [[X/Quirks|X Quirks]] - Fixes for some common hardware-specific issues
 * [[X/FixingCrashes|X Crash Fixing]] - How to fix X crashes
 * [[X/InterpretingIntelGpuDump]] - Ringbuffers, batchbuffers, and the meaning of `intel_gpu_dump` output
 * [[X/DebuggingWithValgrind]]
 * [[X/NonGraphicalBoot]] - Running X manually, without gdm
 * [[X/Debugging/WirelessWithoutX|Wireless Without X]] - How to get a wireless network connection without X.
 * [[X/Debugging/WiredWithoutRouter|Direct Wired Without WAP]] - How to connect two laptops with direct ethernet cord.
 * [[https://help.ubuntu.com/community/BootOptions|BootOptions]]
   * [[http://wiki.cchtml.com/index.php/Ubuntu_Feisty_Installation_Guide|fglrx installation on Ubuntu]]
 * DebuggingUsplash
 * [[X/Dev/DeviceTreeHWDetection]]
 * [[X/Troubleshooting/FglrxInteferesWithRadeonDriver|Switching between -fglrx and -ati drivers]]
 * [[X/Troubleshooting/NvidiaDriverSwitching|Switching between -nvidia and -nouveau drivers]]
 * The {{{drm.debug=0x04}}} kernel option can be used to get additional debugging data included in your {{{dmesg}}} output.

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:

Common Problems

Troubleshooting Techniques


CategoryDebugging

X/Troubleshooting (last edited 2017-11-18 18:25:00 by penalvch)