freebsd-mobile Digest, Vol 411, Issue 3

[安琪]

Re:I like Dell xps 15,thinkpad is not good.

2011/6/1  <freebsd-mobile-request at freebsd.org>:
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>   1. Re: Any experience with ThinkPad T420/T520  (Kevin Oberman)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 31 May 2011 08:22:43 -0700
> From: "Kevin Oberman" <oberman at es.net>
> Subject: Re: Any experience with ThinkPad T420/T520
> To: bschmidt at freebsd.org
> Cc: freebsd-mobile at freebsd.org
> Message-ID: <20110531152243.5BB791CC0D at ptavv.es.net>
>
>> Sender: Bernhard Schmidt <bschmidt at techwires.net>
>> From: Bernhard Schmidt <bschmidt at freebsd.org>
>> Date: Tue, 31 May 2011 07:56:19 +0200
>>
>> On Monday, May 30, 2011 18:54:31 Kevin Oberman wrote:
>> > > Sender: Bernhard Schmidt <bschmidt at techwires.net>
>> > > From: Bernhard Schmidt <bschmidt at freebsd.org>
>> > > Date: Mon, 30 May 2011 09:15:53 +0200
>> > >
>> > > On Sunday, May 29, 2011 18:53:43 Kevin Oberman wrote:
>> > > > I'm about to order  new laptop and I am looking at a Lenovo ThinkPad
>> > > > T520. Does anyone have experience with this model? Anything that should
>> > > > cause alarm? I plan on getting the nVidia 4200N graphics which should
>> > > > work with the nVidia driver.
>> > >
>> > > What's the current state of "Optimus" support? Last time I've
>> > > checked the NVIDIA driver had no support for that so you might
>> > > be stuck with the Intel GPU.
>> > >
>> > Oops! I typed too quickly. I just found te thread on Optimus support and
>> > I'm scanning it now.
>>
>> Honestly, I have no clue about the details. The only thing I know
>> is that there are 2 ways to switch between GPUs, a real hardware
>> switch (which should work on every system) and plain software, which
>> didn't last time I've checked, on either Linux or FreeBSD. That
>> bothered me quite a bit, decided to buy a "gamer notebook" which
>> clearly stated that it has no Optimus therefore.
>
> Bernhard,
>
> I have spent some time researching this and it looks like it is partly
> resolved under Linux. (They call it solved, but it's really a kludge
> that I would hardly call a final resolution). The "fix" is mostly to
> ACPI and very Linux specific, as far as I can tell. Not that doing the
> same under FreeBSD would not be possible, but it will take some work by
> someone with both more ACPI and graphics knowledge than I have.
>
> I decided to save a few bucks and ordered the T520 without the nVidia...
> Just straight Intel which will be pretty limited, too, until the KMS and
> GEM work is available. Sigh.
>
> Thanks again for the heads up!
> --
> R. Kevin Oberman, Network Engineer
> Energy Sciences Network (ESnet)
> Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
> E-mail: oberman at es.net                  Phone: +1 510 486-8634
> Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
>
>
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> End of freebsd-mobile Digest, Vol 411, Issue 3
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