On Fri, Feb 25, 2005 at 04:05:43PM -0500, David Dawes wrote: >On Fri, Feb 25, 2005 at 07:35:37PM +0100, Nicolas Joly wrote: >>I made some other tests today and noticed a few things: >> >>- The loop problem only occurs with the "unusual" 1024x600 mode. Even >> Windows does not deal with that mode. Looks like a BIOS bug ? > >Most likely, yes. > >>- The missing 1024x768 mode, that was there with the previous realease >> module, seems to be invalidated due to HSync not in default range. >> I'm getting a value of 33.8, indeed outside from 28.00-33.00 >> range. >> I'm currently thinking that the new `i830GetModePool()' function >> does not give exactly the same results as `VBEGetModePool()'. >> I can get this working mode back by increasing the HSync range to >> 28.00-34.00 kHz. > >In the absence of DDC-probed monitor parameters or explicitly specified >parameters, it seems that the fallback monitor defaults were not getting >set before VBEGetModePool() was called. Thus, modes that should have >been excluded were not being excluded. The vesa driver still has this >bug. I'll look into fixing VBEGetModePool() to correctly handle this >situation, and add warnings to xf86CheckModeForMonitor() for when it is >called before monitor parameters are set. I've committed some changes that fix this. >This has been resolved in the current i830 driver, which accounts for >the change in behaviour that you are seeing. However, in the case of >flat panels, the driver can and should set better default monitor >parameters, namely parameters that are consistent with a panel sized >mode at 60Hz refresh. Most drivers probably still don't handle this >correctly. I modified the neomagic driver to do this shortly before the >4.4.0 release, and that's a good example of how it can be done. The changes I've just committed provide an easier way of doing this too. You might want to see if you can make use of this in the i830 driver. David _______________________________________________ XFree86 mailing list XFree86@xxxxxxxxxxx http://XFree86.Org/mailman/listinfo/xfree86
