Hi, Daniel, Thanks for the prompt reply. From your reply looks like I still have a little hope. How about if I only run 1024x768 at 60Hz or 30Hz resolution? Will that address the dotclock problem between LVDS and TV? Thanks, Guo On Fri, Jul 13, 2012 at 9:10 AM, Daniel Vetter <daniel at ffwll.ch> wrote: > On Fri, Jul 13, 2012 at 5:59 PM, Guo Tang <guo.tang at sonoartis.com> wrote: > > Hi, > > Greetings! > > > > I have a system with GM 45 chip set. I want to have 3 displays: LVDS, > VGA, > > and TV output. There is no need for > > them to show different contents. So only clone display is required. From > GM > > 45 chip set spec, looks like only 2 > > display ports can be active at the same time. Is it possible to modify > > driver to get 3 clone displays? Any suggestion > > to where in the driver/Kernel I can poke around would be appreciated. > > This does not work, because both LVDS and TV run on a fixed clock > (which does not necessarily agree with the dotclock of the mode), > hence you can't clone them. At least not in all cases, and imo trying > to support such a configuration in more cases is wasted effort. If you > need to drive that many outputs, you're not in the market of a low-end > igd solution like gm45 imho. > > Cheers, Daniel > -- > Daniel Vetter > daniel.vetter at ffwll.ch - +41 (0) 79 364 57 48 - http://blog.ffwll.ch > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/intel-gfx/attachments/20120713/ca626ad7/attachment.html>
