linux-kernel - DDC on Thinkpad x220

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Message-ID: <20190930184707.GA5703@amd>
Date:   Mon, 30 Sep 2019 20:47:07 +0200
From:   Pavel Machek <pavel@....cz>
To:     kernel list <linux-kernel@...r.kernel.org>,
        intel-gfx@...ts.freedesktop.org, rodrigo.vivi@...el.com,
        joonas.lahtinen@...ux.intel.com, jani.nikula@...ux.intel.com
Subject: DDC on Thinkpad x220

Hi!

Thinkpad X220 should be new enough machine to talk DDC to the
monitors, right? And my monitor has DDC enable/disable in the menu, so
it should support it, too...

But I don't have /dev/i2c* and did not figure out how to talk to the
monitor. Is the support there in the kernel? What do I need to enable
it?

lspci says:

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation
Core Processor Family Integrated Graphics Controller (rev 09)

Thanks,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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