Troubleshooting
Common Problems
X/Glossary - Common error messages and terminology
X Transitions - Explanation for "installing xserver-xorg-core would break existing software"
i855 is Unsupported - Explanation of why i845, i855, i865, etc. chips aren't supported
Hybrid Graphics is Unsupported - Not officially supported, but the community has workarounds
Troubleshooting Techniques
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 - Fixes for some common hardware-specific issues
X Crash Fixing - How to fix X crashes
X/InterpretingIntelGpuDump - Ringbuffers, batchbuffers, and the meaning of intel_gpu_dump output
X/NonGraphicalBoot - Running X manually, without 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.
The drm.debug=0x04 kernel option can be used to get additional debugging data included in your dmesg output.