For instance, it may misreport things or omit capabilities (like VESA modes). During startup or when a monitor is hotplugged, the X server queries this data from the monitor and uses it to set a resolution.ĭue to variances in how the EDID standard is implemented by different hardware manufacturers, it cannot always be 100% trusted. For procedures to troubleshoot resolution problems, read on.Ĭomputer monitors contain a small binary packet of information called Extended Display Information Data (EDID), which describes the monitor's size, modelines, etc. Even so, it can still get it wrong from time to time, for various reasons.įor help on manually configuring screen resolutions, please see X/Config/Resolution. Over the years, Xorg has gotten much better at automatically detecting and configuring monitor resolutions.

Problem: Resolution with Intel graphics was correct in Intrepid/Jaunty/Karmic (with no nf configuration) but is limited in Lucid.

Problem: Resolution with Intel graphics was correct in Intrepid or Jaunty (with no nf configuration) but is limited in Karmic.

Problem: Wrong resolutions, refresh rates, or monitor specs.

Problem: Autodetection results in reduced resolutions available.

Problem: The LCD's maximum resolution is detected automatically, but lower resolutions are not available.

Problem: Incorrect Resolution when no EDID available such as from old monitor or a KVM device.

Nvidia custom resolution not showing