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  1. [all variants] Automatic video driver switching for laptops with switchable graphics

    I developed a method for automatically switching the video driver on my laptop depending on which graphics chip I choose at boot time. I have mentioned this in other threads and have been asked for...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    One additional point: The Lenovo text posted by MeikelP also suggests that the W520 could actually drive 3 independent monitors (!) using nvidia graphics. I believe this is true based on my...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    On the W520 you can use an external monitor with Integrated (intel) graphics, but VGA only. To use DVI (digital) monitors you need to run Discrete (nvidia) graphics. I believe the Lenovo table...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences -> randomly shut down?

    wolfindersteppe,

    I have been running Ubuntu 11.04 32-bit PAE on my W520 for nearly 3 months now, and I have never experienced a sudden unexpected shutdown. There are plenty of other quirks with...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    Roberto,



    I don't have very many answers, but I can at least tell you that Turbo Boost frequency is not reported in /proc/cpuinfo, so most if not all typical linux applets won't report it...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    hemmecke, have you disabled acpi? I'm not sure, but perhaps that could prevent the CPU from speed stepping.

    FYI, my experiences are very similar to what Andrei is reporting. I'm also on 1.26 and...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    dimm0k,



    Yes, I think that's right. I did play around with the settings, but I think the ones I'm using are the defaults.



    OK, that makes sense. I remember reading about the fan...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    dimm0k, here are power management settings in the BIOS config:

    Intel (R) SpeedStep Technology
    Mode for AC = Maximum Performance
    Mode for Battery = Battery Optimized

    Adaptive Thermal...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    So, I just played with it some more and got some very odd results. I suspect there is a bug in BIOS 1.26.

    When I boot with the AC adapter plugged in, I see no difference in CPU Turbo Boost speed...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    dimm0k, thanks for the link to the Lenovo thread on Turbo Boost. I hadn't seen that before. I didn't even realize that Turbo Boost had been working on BIOS < 1.25. I guess in reality I broke it...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    VValdo, thanks for pointing us to the other thread. Sounds like there are others out there who are struggling with the recent 64-bit Ubuntu releases on both the W520 and the T420. I'm glad to hear...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    dimm0k - you're right about the BIOS update being scary. They could really use a progress bar. Plus, that message after the update completes is hilarious - they tell you that you can (1) leave the...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    dimm0k, thanks a ton for sharing the info about BIOS 1.26. After I read the release notes which list this fix:



    ...then I couldn't help but try the BIOS update even though it's only a...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    I also found the i7z utility for reporting CPU speed, apparently including Turbo Boost speed:

    http://code.google.com/p/i7z/

    (You'll need to install libncurses5-dev from the repository before...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    dimm0k, welcome!

    Interesting comments about BIOS version and ACPI. I'm pretty sure I was running BIOS 1.22 when I had all those problems with Ubuntu 11.04 64-bit with Discrete graphics, although...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    wolfindersteppe, yes I have done that, and yes it worked for me with 11.04 32-bit selecting "Discrete Graphics" in the BIOS. But I only tried it one time a few days ago just to see if it would work,...
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    [SOLVED] Re: NVidia Quadro 1000M (ThinkPad W520)

    I just got it working. The script was executable; that wasn't the problem. The other thread suggests that you only need to disable the odd numbered CPUs (i.e. the hyperthreaded ones). But for some...
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    [SOLVED] Re: NVidia Quadro 1000M (ThinkPad W520)

    Update from my side... After three days running 32-bit 11.04 everything is still running great with a couple minor exceptions. I have noticed that I am seeing the problem with stuttering video...
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    [SOLVED] Re: NVidia Quadro 1000M (ThinkPad W520)

    VValdo, I was getting occasional lockups too, maybe once per day.

    However, I seem to have solved my problems today. The magic recipe is... running 32-bit Ubuntu, plus updating the BIOS to version...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    Update on my experiences...

    64-bit is a no go, at least for me. I tried 10.10 and 11.04. 10.10 was a total disaster; the machine would sometimes hang on boot, and sometimes ran at an incredibly...
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    [SOLVED] Re: NVidia Quadro 1000M (ThinkPad W520)

    Daniel - Thanks for the info and especially the prompt reply. You've given me some hope. I'll give the 10.10 release a shot plus the workarounds you cited. Now that you mention it, I remember...
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    [SOLVED] Re: NVidia Quadro 1000M (ThinkPad W520)

    Has anyone been able to get the W520 to boot with the proprietary nvidia driver WITHOUT disabling ACPI (kernel parameter "acpi=off")? If so, can you share your recipe?

    I am running kernel...
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    [ubuntu] Re: Ubuntu On Thinkpad W520: Your Experiences

    sentraser,

    I have had a W520 for about a week now as an upgrade to my old W500 (I skipped the W510 generation). I have to say that this W520 has been a little challenging, although I am writing...
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    [ubuntu] Re: flash player not working

    I ran into problems with Flash on Youtube, and found advice elsewhere that suggested disabling hardware acceleration in Flash. In what I've read, there is some suspicion that Youtube recently...
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    [all variants] Re: Ubuntu/Kubuntu (8.10) on Lenovo W500

    I have also had problems with my bluetooth mouse that started in 10.10. I'm not sure if my problems are related; I attributed them to the new bluedevil bluetooth stack which, I think, is only part...
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