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XAA or EXA?

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  • agd5f
    replied
    IIRC, r6xx and above use glamor by default. EXA is only used for r1xx-r5xx asics.

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  • Michael
    replied
    Originally posted by bridgman View Post
    My recollection is that we are only supporting GLAMOR on more recent GPUs. Don't remember offhand where "more recent" starts but I believe it is everything since the gfx6 / SI / HD7xxx generation.
    Yeah was SI / GCN if my memory serves me as well where it went GLAMOR-only.

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  • bridgman
    replied
    My recollection is that we are only supporting GLAMOR on more recent GPUs. Don't remember offhand where "more recent" starts but I believe it is everything since the gfx6 / SI / HD7xxx generation.

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  • moonkrj
    replied
    Originally posted by bridgman
    EXA operation in the X server wasn't able to be polished until there were enough drivers implementing EXA support. Once EXA was added to a couple of drivers some work was done on the X server to improve performance, but that happened over a period of a year or so. I had to write my paper during that time, and EXA support was available in the drivers but wasn't recommended for general use at first. A bit later EXA was ok for general use but only if you had the very newest X server code.

    These days EXA is enabled by default and should be fine for general use. The only reason to go back to XAA now would be if you had some quirky hardware (typically AGP bus problems) and needed to disable acceleration features in order to get stability, but I think there are EXA options that will work in most cases as well.
    I had Fedora 10 several of yeas ago and XAA in xorg.conf would constantly crash everything. I've also seen a lot of thread on fedora forums about GLAMOR having issues with drawing round interface objects. Any experience with both GLAMOR and EXA acceleration methods? Also: is raster graphics system on EXA more stable (and/or safer)?

    Sorry for bumping.
    Last edited by moonkrj; 10 June 2019, 05:49 AM. Reason: question

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  • bridgman
    replied
    EXA operation in the X server wasn't able to be polished until there were enough drivers implementing EXA support. Once EXA was added to a couple of drivers some work was done on the X server to improve performance, but that happened over a period of a year or so. During that time, EXA support was available in the drivers but wasn't recommended for general use at first. A bit later EXA was ok for general use but only if you had the very newest X server code.

    These days EXA is enabled by default and should be fine for general use. The only reason to go back to XAA now would be if you had some quirky hardware (typically AGP bus problems) and needed to disable acceleration features in order to get stability, but I think there are EXA options that will work in most cases as well.

    Leave a comment:


  • tormod
    replied
    I remember having seen lots of bug reports on older radeon cards having to use XAA but I think this has been resolved in KMS/DRI2. One example is https://bugs.freedesktop.org/show_bug.cgi?id=23660. Since Ubuntu switched to KMS for radeon by default this should not be an issue.

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  • adamk
    replied
    Originally posted by Panix View Post
    I'll be installing Ubuntu 10.04 soon on my old Thinkpad.

    I went to Thinkpad forums and some users are saying they had to use XAA!
    Why? You haven't given us much to go on here...

    Adam

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  • jrch2k8
    replied
    Originally posted by Panix View Post
    I'll be installing Ubuntu 10.04 soon on my old Thinkpad.

    I went to Thinkpad forums and some users are saying they had to use XAA!

    What?!? I thought there was a transition to EXA now?

    What are you supposed to use for older hardware?!? Mobility Radeon cards in R200 to R300...R250... Radeon 7500 to 9000 cards.... Mine's a R250 / 9000.

    This problem/issue has been going on for eons... I remember way back reading long threads about what to edit xorg.conf to...to use XAA or EXA... what a mess... that's why I gave up on Linux on my laptop...

    Now, I'm using Compiz/Effects and Debian Squeeze LXDE is running okay...but, I haven't checked out graphics effects... too scared to.
    ubuntu 10.04 already have out the box support for your card,so you dont even have to worry about that anymore

    btw XAA is legacy now, EXA is the one for newer distros (is the default now and it activates automatically now)

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  • Panix
    started a topic XAA or EXA?

    XAA or EXA?

    I'll be installing Ubuntu 10.04 soon on my old Thinkpad.

    I went to Thinkpad forums and some users are saying they had to use XAA!

    What?!? I thought there was a transition to EXA now?

    What are you supposed to use for older hardware?!? Mobility Radeon cards in R200 to R300...R250... Radeon 7500 to 9000 cards.... Mine's a R250 / 9000.

    This problem/issue has been going on for eons... I remember way back reading long threads about what to edit xorg.conf to...to use XAA or EXA... what a mess... that's why I gave up on Linux on my laptop...

    Now, I'm using Compiz/Effects and Debian Squeeze LXDE is running okay...but, I haven't checked out graphics effects... too scared to.
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