Date: Wed, 23 May 2012 15:19:14 -0700 From: Kevin Oberman <kob6558@gmail.com> To: =?ISO-8859-1?Q?Natacha_Port=E9?= <natbsd@instinctive.eu> Cc: freebsd-acpi@freebsd.org Subject: Re: How can I help with thinkpad x220 issues? Message-ID: <CAN6yY1vbc5DJcc4GrktyJaokA6CPNgTdx5X%2BHH7J1W_NvLJPxA@mail.gmail.com> In-Reply-To: <20120523151357.GC97037@sigil.instinctive.eu> References: <20120523151357.GC97037@sigil.instinctive.eu>
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On Wed, May 23, 2012 at 8:13 AM, Natacha Port=E9 <natbsd@instinctive.eu> wr= ote: > Hello, > > I happen to be the owner of a brand new Lenovo Thinkpad X220. From a > recent thread here I gather it almost works with FreeBSD, and the > remaining problems are screen brightness and screen left unpowered at > resume. Is that right? > > So my question is, how can I help make progress in any of these area? > (though I admit I'm more interested in having the brightness problem > solved than the resume one) > > I don't know anything about ACPI or about FreeBSD or Linux internals, > but I'm quite proficient in C and somewhat used to navigate in unknown > huge code bases. > > So I guess the first steps to help would be to first learn stuff. > > However I don't have much time available. I guess FreeBSD 11 would reach > end-of-life before I could reach a level of understanding I find > satisfying (though I admit I have high standards there), so I would have > to prioritize. So my question is rather *what* should I learn to provide > help as soon as possible? > > For example, if the brightness issue is just a matter of extracting the > right numbers from linux kernel code and plug them into FreeBSD, I > probably won't need to learn anything more about ACPI than what I would > gather looking at the code. I guess if it was that simple someone would > have already done it, but that illustrate well my point about > prioritizing learning. > > Or is the barrier of entry too high for me to be of any use? If it has not been committed, the minor fix to make acpi_ibm work on modern ThinkPads needs to be committed. Once done, the issues mentioned need to be addressed.This includes getting brightness to be setable from both the keypad hot-keys and from applications. ATM, I can set the brightness, but making the hot-keys work will require the ability to extract the current level so that it may be adjusted plus/minus one. The other issue is volume control keys don't work. I suspect it will be similar to brightness, but I don't know just how to figure it out. I should also mention that I don't have an X220. I have a T520, but the issues seem to be identical, so fixing one will probably fix a lot of recent ThinkPads. --=20 R. Kevin Oberman, Network Engineer E-mail: kob6558@gmail.com
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