On 04/04/2016 10:58 PM, Ville Syrjälä wrote: > >> Since this VBT mode is probably junk anyway, I commented out the >> if-statement that selects it (in intel_lvds.c), so that the code will >> pick the mode as set by BIOS. The result is much better, I actually get >> proper looking output! X also runs well on top of that. >> >> There are still several errors in the log file though (probably caused >> by my little hack), see here: http://pastebin.com/UbCjizSV. >> >> Is using the mode as set up by BIOS the way to go for LVDS? If so, is >> there a module parameter that can force this, or force the bogus VBT to >> be disregarded? > Can you provide a dump of /sys/kernel/debug/dri/0/i915_opregion ? > > Maybe file a bug in bugs.freedesktop.org and attach it (and the dmesg > logs you already have) there so we don't lose these.
Sure! I added the opregion blob to the newly opened bug here: https://bugs.freedesktop.org/show_bug.cgi?id=94825 > You also said you can choose the panel type in the BIOS? Does it have > some predefined set of panels or something? I would have assumed > changing that might patch the VBT to point at the correct timings. Yes, there's a list of modes, and the correct one is selected. I've added an image to the bug entry. I don't know if the 1024x768 mode mentioned in the boot log is the same as the 1024x768 mode in that bios list, or why only that mode is found.. I assume that the 1920x1080 at 148.5M mode was added by the vendor of the display set to match the panel that they use. Cheers, Rob
