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Nouveau Graphics On Linux 3.15

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  • agd5f
    replied
    Originally posted by bridgman View Post
    I suspect agd5f would tell you that dpm was the hardest feature to get working on radeon as well, even with direct support from the hardware and Catalyst driver teams.
    Yes. Power management is a huge amount of work to get working stable across all cards.

    Leave a comment:


  • Azrael5
    replied
    may you test it with other video cards?

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  • Michael
    replied
    Originally posted by kbz5x72hp-iv View Post
    I've heard some opinions saying that nouvea performs much worse than proprietary drivers, but some people told me it's pretty good, so I'd like to know how bad "vastly" is.

    And I didn't say anything about regularly - just once and then each time some important change happens.
    http://www.phoronix.com/scan.php?pag..._nouveau&num=1

    etc....

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  • kbz5x72hp-iv
    replied
    Originally posted by Michael View Post
    No point in doing such a comparison regularly when until re-clocking is solved, Nouveau vastly under-performs the NVIDIA driver...
    I've heard some opinions saying that nouvea performs much worse than proprietary drivers, but some people told me it's pretty good, so I'd like to know how bad "vastly" is.

    And I didn't say anything about regularly - just once and then each time some important change happens.

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  • Michael
    replied
    Originally posted by kbz5x72hp-iv View Post
    Would be nice if you compared nouveau and nvidia proprietary driver instead.
    No point in doing such a comparison regularly when until re-clocking is solved, Nouveau vastly under-performs the NVIDIA driver...

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  • kbz5x72hp-iv
    replied
    Would be nice if you compared nouveau and nvidia proprietary driver instead.

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  • Morpheus
    replied
    But I thought there was a frequency/voltage table in the video bios. Is it not possible for the driver to read this table ? It should prevent hardware breakage, but i'm not a hardware expert, I may be totally wrong :/

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  • bridgman
    replied
    Originally posted by Weegee View Post
    Just curious: What exactly is holding back automatic core/memory reclocking support (except for NVIDIA of course :P)? The Nouveau team has done an excellent job when it comes to reverse engineering, does anyone know why reclocking in particular is so problematic?
    I suspect agd5f would tell you that dpm was the hardest feature to get working on radeon as well, even with direct support from the hardware and Catalyst driver teams.

    Leave a comment:


  • Spittie
    replied
    Originally posted by Weegee View Post
    Just curious: What exactly is holding back automatic core/memory reclocking support (except for NVIDIA of course :P)? The Nouveau team has done an excellent job when it comes to reverse engineering, does anyone know why reclocking in particular is so problematic?

    Also, how can end users help the developers? Is there any code/build we could actually test (without harming our hardware obviously), or is it still so far away? The feature matrix for Nouveau power management only says WIP (or MOSTLY if you don't have a Kepler GPU) ...
    Because reclocking is a dangerous feature. Get it wrong, and you risk frying some cards.
    So, even if they have it mostly working, it's still not enabled by default because they can't be sure it will work for every card.
    It's also something that it's slightly different for every card, you have to modify both the clock and the voltage, every card has at least a different frequency for core/shaders/memory, there are many kinds of memory (ddr2, dd3, gddr5...) ecc...

    As for helping, I guess the best way is to drop in #nouveau (over freenode) and ask if they need some test. But considering they blocked manual reclocking in recent-ish kernel (without recompiling the kernel) I'm not sure that they want/need testing from users.

    Leave a comment:


  • Weegee
    replied
    Just curious: What exactly is holding back automatic core/memory reclocking support (except for NVIDIA of course :P)? The Nouveau team has done an excellent job when it comes to reverse engineering, does anyone know why reclocking in particular is so problematic?

    Also, how can end users help the developers? Is there any code/build we could actually test (without harming our hardware obviously), or is it still so far away? The feature matrix for Nouveau power management only says WIP (or MOSTLY if you don't have a Kepler GPU) ...

    Leave a comment:

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