Dear Kroms,
Am Montag, den 13.07.2015, 09:43 +0200 schrieb [email protected]: […] > > There are two more things two do. > > > > 1. Contact the Linux i915 folks and ask them, if the module is able > > to detect the configuration itself and does not rely on the > > firmware or if there is a way to override that setting from the > > Linux command line. > > Who is going to do this? Is this [1] the right community? I am not > sure, if I am able to explain it right. > If you want me to do this, what do you mean exactly with "the > module", is it "i915"? Yes i915 and it’d be great if you could do it. At least the second question should be answered. Looking at `/sbin/modinfo i915` it shows that there is such an option already. parm: lvds_channel_mode:Specify LVDS channel mode (0=probe BIOS [default], 1=single-channel, 2=dual-channel) (int) So you could add `i915.lvds_channel_mode=2`, I think, to the Linux command line and see if Linux is able to initialize your system. > On [2], is written: > "Linux (kernel) has its own init code (including EDID parsing). The > current suspicion is that coreboot's own initialization code has > buggy EDID parsing in some way, such that the proper settings for the > panel are not used, leading to the failure." > > Please tell me, if I understand it right: > The kernel module should not rely on coreboot concerning the settings > for the display and you want to know, > if the kernel module is able to get the needed information direct > from the display (EDID)? If this is possible, you want to know, > if this is configurable with the Linux command line? Means "Linux > command line" the same as "kernel command line"? Yes. But I am not sure if it’s related to EDID parsing at all. coreboot just hard codes it. > > 2. Improve coreboot so that the LVDS link configuration is detected > > during runtime as the vendor firmware (VGA Option ROM/Video > > BIOS(?)) > > does. > > While I am learning a lot of things working on this issue, this is > far above my skills. No problem. Maybe somebody else will do it. Thanks, Paul > [1] https://01.org/linuxgraphics/community/kernel > [2] http://libreboot.org/docs/hcl/gm45_lcd.html
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