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@148.5M mode was added by the vendor of the
display set to match the panel that they use.
Cheers,
Rob
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