Troubleshooting

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General Issues
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 * [[X/Troubleshooting/HighCPU|High CPU issues]]
 * [[DebuggingKernelSuspend|Suspend and Resume issues]]
 * [[X/Troubleshooting/XServerCrashOnResume|xserver crash on resume]]
 * [[X/Troubleshooting/XError|Program received an X Window System error]]
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 * [[X/Troubleshooting/Other|Other common issues...]]

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]]
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 * [[X/Troubleshooting/Resolution|Resolution issues]]
 * [[X/Troubleshooting/HighCPU|High CPU issues]]
 * [[X/Troubleshooting/BlankScreen|Blank Screen on startup issues]]
 * [[X/Troubleshooting/Freeze|Freeze issues]]
 * [[X/Troubleshooting/SingleColorScreen|Single color (brown/blue/etc.) screen on startup]]
 * [[X/Troubleshooting/HugeFonts|Fonts displayed way too big]]
 * [[X/Troubleshooting/XServerCrashOnResume|xserver crash on resume]]
 * [[X/Troubleshooting/OnlyLoadsVesa|Only loads vesa instead of correct driver]]
 * [[X/Troubleshooting/IntelPerformance|Intel graphics performance issues]]

Input Issues
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 * [[X/Troubleshooting/XError|Program received an X Window System error]]
 * [[X/Troubleshooting/NvidiaDriverMissingKernelDriver]]
 * [[X/MonitorDetection|Monitor Detection problems]]
 * [[X/Troubleshooting/Other|Other common issues...]]
 * [[DebuggingKeyboardDetection|Keyboard detection]]
 * [[DebuggingTouchpadDetection|Touchpad detection]]
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Booting
 * [[https://help.ubuntu.com/community/BootOptions|Boot Options]]
 * [[DebuggingKernelBoot|Debugging Kernel Boot Problems]]
 * [[X/NonGraphicalBoot|Non-Graphical Booting]] - 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.

Crashes and Freezes
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 * [[X/Bisecting]] - Using bisection techniques to solve regressions or backport fixes  * [[X/FixingCrashes|X Crash Fixing]] - How to fix X crashes
 * [[X/InterpretingIntelGpuDump|Interpreting GPU Dumps]] - Ringbuffers, batchbuffers, and the meaning of `intel_gpu_dump` output
 * [[X/DebuggingWithValgrind|Valgrind]] - Debugging memory leaks

Other Techniques
 * [[X/Bisecting|X Bisecting]] - Using bisection techniques to solve regressions or backport fixes
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 * [[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/Dev/DeviceTreeHWDetection|Device Tree]]
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 * 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

General Issues

Display Issues

Input Issues

Troubleshooting Techniques

Booting

Crashes and Freezes

Other Techniques


CategoryDebugging

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