<div class="gmail_quote">2011/11/28 Adam Jackson <<a href="mailto:ajax@redhat.com">ajax@redhat.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> <div class="im">On 11/28/11 12:28 PM, Keith Packard wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On Wed, 26 Oct 2011 10:53:11 -0400, Adam Jackson<<a href="mailto:ajax@redhat.com" target="_blank">ajax@redhat.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> On Wed, 2011-10-19 at 10:28 -0400, Adam Jackson wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> I assume the SDVO LVDS options block in the VBT would tell us what bits are correct to program here, but intel_bios.h documents only the layout of that structure, not its content. Or, we can hope that the SDVO card set it up correctly for us (hah). Intel people, care to shed some light here? </blockquote> Just re-raising this. I suspect we can't support SDVO LVDS correctly without knowing more here. In particular: - what "panel type" means in struct bdb_sdvo_lvds_options </blockquote> Which of the four panels in the SDVO info is actually connected. </blockquote> </div> Thank you for this! Let's see if we can figure the rest of this out. 4ernov, can you build a kernel with the following patch added: <a href="http://lists.freedesktop.org/archives/intel-gfx/2011-November/013662.html" target="_blank">http://lists.freedesktop.org/archives/intel-gfx/2011-November/013662.html</a> and boot with drm.debug=0x4, and attach dmesg from running it? Also, describe your configuration more exactly; it's clear from older emails from you that you have two SDVO LVDS, but are they the same resolution? </blockquote><div> Thanks, Keith and Adam. Yes, I hope I'll have the result tomorrow. Adam, according to the patch the information you want is an output from SDVO_CMD_GET_LVDS_PANEL_INFORMATION. If it's right I can post it tomorrow morning as I've already printed it after you suggested me this command. I should also say that SDVO_CMD_SET_LVDS_PANEL_INFORMATION is also work: I sent a byte to force 24-bit LVDS mode and it was set properly. As of configuration: yes, there're two monitors with the same resolution, 800x600@60Hz, connected via 24-bit LVDS (AFAIK SPWG format) to i945GME chipset through Chrontel SDVO converters. As I said before, unfortunately, current BIOS doesn't support OpRegion so it seems there's no access to VBT. </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> - ajax </blockquote></div>