![]() ![]() If you're lucky you can override the VGA settings by passing an appropriate kernel parameter, e.g.: With KMS in use, you cannot workaround the problem using nf quite so easily. In a worst-case situation you may need to construct modelines as well. You will at least need to specify the horizontal refresh and vertical sync values, and probably also itemize the resolutions. If you are not using Kernel Mode-Setting, you can work around this by crafting a suitable nf. Sometimes the EDID from the monitor simply cannot be reached, either because it isn't there (such as in the case of some really old monitors) or some intermediary device like a KVM switcher is corrupting it or filtering it out. Problem: Incorrect Resolution when no EDID available such as from old monitor or a KVM device In Karmic for Intel Graphics and Lucid for ATI and NVIDIA, the logic for setting up monitor resolutions moved from the X server to the kernel, however in some cases the quirks or other specialized logic in the X server has not been copied over. The X server includes mechanisms, called 'quirks', for working around these problems and fill in missing data where appropriate. 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. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |