X driver -- sna vs uxa

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X driver -- sna vs uxa

Jonathan Ryshpan
These should be easy to find out but they don't seem to be:

What X driver does my system use? If as I suspect it's for intel/Haskel, is it set to use sna or uxa acceleration?

Hardware is:
4 core
Intel(R) Core(TM) i5-4460  CPU @ 3.20GHz
Software is:
Fedora-26 with all updates
Kernel 4.11.12-200.fc25.x86_64
KDE Frameworks 5.36.0

Thanks - jon


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Re: X driver -- sna vs uxa

Ed Greshko
On 08/07/2017 09:34 AM, Jonathan Ryshpan wrote:

> These should be easy to find out but they don't seem to be:
>
> What X driver does my system use? If as I suspect it's for intel/Haskel, is it set
> to use sna or uxa acceleration?
>
> Hardware is:
> 4 core
> Intel(R) Core(TM) i5-4460  CPU @ 3.20GHz
> Software is:
> Fedora-26 with all updates
> Kernel 4.11.12-200.fc25.x86_64
> KDE Frameworks 5.36.0

If you check the change log for xorg-x11-drv-intel you would see that....

* Wed Oct 02 2013 Adam Jackson <[hidden email]> 2.21.15-4
- Default to uxa again

You, of course, could switch to sna by creating an xorg.conf which specifies it.


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Re: X driver -- sna vs uxa

Ed Greshko-2
In reply to this post by Jonathan Ryshpan
On 08/07/2017 09:34 AM, Jonathan Ryshpan wrote:

> These should be easy to find out but they don't seem to be:
>
> What X driver does my system use? If as I suspect it's for intel/Haskel, is it set
> to use sna or uxa acceleration?
>
> Hardware is:
> 4 core
> Intel(R) Core(TM) i5-4460  CPU @ 3.20GHz
> Software is:
> Fedora-26 with all updates
> Kernel 4.11.12-200.fc25.x86_64
> KDE Frameworks 5.36.0
>
Oh, and I believe if you looked in the Xorg.0.log it would tell you what is being
used more definitely than what I've assumed is an accurate changelog.  FWIW, I don't
use Intel Graphics Hardware.

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Re: X driver -- sna vs uxa

Michael Cronenworth
In reply to this post by Jonathan Ryshpan
On 08/06/2017 08:34 PM, Jonathan Ryshpan wrote:

> These should be easy to find out but they don't seem to be:
>
> What X driver does my system use? If as I suspect it's for intel/Haskel, is it set
> to use sna or uxa acceleration?
>
> Hardware is:
> 4 core
> Intel(R) Core(TM) i5-4460  CPU @ 3.20GHz
> Software is:
> Fedora-26 with all updates
> Kernel 4.11.12-200.fc25.x86_64
> KDE Frameworks 5.36.0

The "intel" X.org driver is deprecated. I recommend you switch to the "modesetting"
driver.

With the modesetting driver installed you can remove the intel driver.
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Total ambibuity and confusion [was: Re: X driver -- sna vs uxa]

Jonathan Ryshpan
In reply to this post by Ed Greshko
On Mon, 2017-08-07 at 09:57 +0800, Ed Greshko wrote:
On 08/07/2017 09:34 AM, Jonathan Ryshpan wrote:
These should be easy to find out but they don't seem to be: What X driver does my system use? If as I suspect it's for intel/Haskel, is it set to use sna or uxa acceleration? Hardware is: 4 core Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz Software is: Fedora-26 with all updates Kernel 4.11.12-200.fc25.x86_64 KDE Frameworks 5.36.0
If you check the change log for xorg-x11-drv-intel you would see that.... * Wed Oct 02 2013 Adam Jackson <[hidden email]> 2.21.15-4 - Default to uxa again You, of course, could switch to sna by creating an xorg.conf which specifies it.
Where is this change log.  Again it should be easy to find, but it seems not to be.

I would expect it to be in
xorg-x11-drv-intel-2.99.917-28.20160929.fc26.src.rpm
but it's not.

Similarly, a Google search for 
changelog "Default to uxa again"
yields this page
http://pkgs.fedoraproject.org/xorg-x11-drv-intel.git/tree/xorg-x11-drv-intel.spec
but trying to access this page produces
Page not found (404)


On Mon, 7 Aug 2017 10:04:27 +0800 Ed Greshko wrote:
Oh, and I believe if you looked in the Xorg.0.log it would tell you what is being
used more definitely than what I've assumed is an accurate changelog.  FWIW, I don't
use Intel Graphics Hardware.

Again, it's not so easy. There's nothing about sna or xua or acceleration in the file.


The man page for intel(4) states that the default is sna. What's correct, the Changelog or the man page? !!FOO!!

Thanks - jon




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Re: X driver -- sna vs uxa

Jonathan Ryshpan
In reply to this post by Michael Cronenworth
On Mon, 2017-08-07 at 11:59 -0500, Michael Cronenworth wrote:
On 08/06/2017 08:34 PM, Jonathan Ryshpan wrote:
These should be easy to find out but they don't seem to be: What X driver does my system use? If as I suspect it's for intel/Haskel, is it set to use sna or uxa acceleration? Hardware is: 4 core Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz Software is: Fedora-26 with all updates Kernel 4.11.12-200.fc25.x86_64 KDE Frameworks 5.36.0
The "intel" X.org driver is deprecated. I recommend you switch to the "modesetting" driver. With the modesetting driver installed you can remove the intel driver.

The modesetting driver appears to be installed since it's part of the xorg-x11-server-Xorg package, which is installed on my system. But possibly not active. Where are instructions on how to find out whether it's active and, if necessary, how to activate it?

Thanks - jon



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KDE Plasma Crashes [was: Re: X driver -- sna vs uxa]

Jonathan Ryshpan
On Mon, 2017-08-07 at 14:05 -0700, Jonathan Ryshpan wrote:
On Mon, 2017-08-07 at 11:59 -0500, Michael Cronenworth wrote:
On 08/06/2017 08:34 PM, Jonathan Ryshpan wrote:
These should be easy to find out but they don't seem to be: What X driver does my system use? If as I suspect it's for intel/Haskel, is it set to use sna or uxa acceleration? Hardware is: 4 core Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz Software is: Fedora-26 with all updates Kernel 4.11.12-200.fc25.x86_64 KDE Frameworks 5.36.0
The "intel" X.org driver is deprecated. I recommend you switch to the "modesetting" driver. With the modesetting driver installed you can remove the intel driver.

The modesetting driver appears to be installed since it's part of the xorg-x11-server-Xorg package, which is installed on my system. But possibly not active. Where are instructions on how to find out whether it's active and, if necessary, how to activate it?

Just after posting this I looked at Xorg.0.log again and found that
    1. the system *is* running the modesetting driver
    2. the modesetting driver's man page says it doesn't do acceleration, which explains why there's no reference to sna or uxa in Xprg.0.log.


    ===> So, I'm left with my original problem, which is why the KDE Plasma desktop often crashes when I close an instance of Firefox with a lot of open windows and/or tabs. I had suspected that it might have something to do with graphics acceleration (there are hints of such problems on the web), but it seems not to be so. Suggestions are welcome. I've reported the crashes to Red Hat's Bugzilla.

    jon


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    Re: Total ambibuity and confusion [was: Re: X driver -- sna vs uxa]

    Ed Greshko
    In reply to this post by Jonathan Ryshpan
    On 08/08/2017 04:51 AM, Jonathan Ryshpan wrote:

    >> On Mon, 2017-08-07 at 09:57 +0800, Ed Greshko wrote:
    >>> On 08/07/2017 09:34 AM, Jonathan Ryshpan wrote:
    >>> These should be easy to find out but they don't seem to be: What X driver does my
    >>> system use? If as I suspect it's for intel/Haskel, is it set to use sna or uxa
    >>> acceleration? Hardware is: 4 core Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz
    >>> Software is: Fedora-26 with all updates Kernel 4.11.12-200.fc25.x86_64 KDE
    >>> Frameworks 5.36.0
    >>
    >> If you check the change log for xorg-x11-drv-intel you would see that....
    >>
    >> * Wed Oct 02 2013 Adam Jackson <[hidden email] <mailto:[hidden email]>> 2.21.15-4
    >> - Default to uxa again
    >>
    >> You, of course, could switch to sna by creating an xorg.conf which specifies it.
    > Where is this change log.  Again it should be easy to find, but it seems not to be.
    To get the change log for an installed package you can do....

    rpm -q --changelog name-of-package     as in

    rpm -q --changelog xorg-x11-drv-intel


    >
    >> Oh, and I believe if you looked in the Xorg.0.log it would tell you what is being
    >> used more definitely than what I've assumed is an accurate changelog.  FWIW, I don't
    >> use Intel Graphics Hardware.
    >
    > Again, it's not so easy. There's nothing about sna or xua or acceleration in the file.
    >

    Right.  After posting this you found the system was defaulting to a different driver.


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    Re: KDE Plasma Crashes [was: Re: X driver -- sna vs uxa]

    Ed Greshko
    In reply to this post by Jonathan Ryshpan
    On 08/08/2017 05:32 AM, Jonathan Ryshpan wrote:

    > On Mon, 2017-08-07 at 14:05 -0700, Jonathan Ryshpan wrote:
    >> On Mon, 2017-08-07 at 11:59 -0500, Michael Cronenworth wrote:
    >>> On 08/06/2017 08:34 PM, Jonathan Ryshpan wrote:
    >>>> These should be easy to find out but they don't seem to be: What X driver does
    >>>> my system use? If as I suspect it's for intel/Haskel, is it set to use sna or
    >>>> uxa acceleration? Hardware is: 4 core Intel(R) Core(TM) i5-4460 CPU @ 3.20GHz
    >>>> Software is: Fedora-26 with all updates Kernel 4.11.12-200.fc25.x86_64 KDE
    >>>> Frameworks 5.36.0
    >>>
    >>> The "intel" X.org driver is deprecated. I recommend you switch to the "modesetting"
    >>> driver.
    >>>
    >>> With the modesetting driver installed you can remove the intel driver.
    >>
    >> The modesetting driver appears to be installed since it's part of the
    >> xorg-x11-server-Xorg package, which is installed on my system. But possibly not
    >> active. Where are instructions on how to find out whether it's active and, if
    >> necessary, how to activate it?
    > Just after posting this I looked at Xorg.0.log again and found that
    >
    >  1. the system *is* running the modesetting driver
    >  2. the modesetting driver's man page says it doesn't do acceleration, which
    >     explains why there's no reference to sna or uxa in Xprg.0.log.
    >
    >
    >
    > ===> So, I'm left with my original problem, which is why the KDE Plasma desktop
    > often crashes when I close an instance of Firefox with a lot of open windows and/or
    > tabs. I had suspected that it might have something to do with graphics acceleration
    > (there are hints of such problems on the web), but it seems not to be so.
    > Suggestions are welcome. I've reported the crashes to Red Hat's Bugzilla.
    >
    What is the bugzilla #?  Even though I don't use Intel HW at the moment it does
    concern KDE which I do run an I would like to follow.  You may also want to post your
    experience on the KDE list as someone there may have run into this.

    Additionally, I think you may also want to try switching to the intel driver.  I
    believe this can be done by just creating an xorg.conf with just

    Section "Device"
            Identifier  "Videocard0"
            Driver      "intel"
    EndSection

    as the content.

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    Re: KDE Plasma Crashes [was: Re: X driver -- sna vs uxa]

    Ed Greshko
    On 08/08/2017 08:30 AM, Ed Greshko wrote:
    > What is the bugzilla #?


    Never mind.  I found it.  https://bugzilla.redhat.com/show_bug.cgi?id=1417396

    No indication as of yet that it is intel specific.

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    Re: X driver -- sna vs uxa

    Wolfgang Pfeiffer
    In reply to this post by Jonathan Ryshpan
    On Mon, 2017-08-07 at 14:05 -0700, Jonathan Ryshpan wrote:
    > [ ... ]
    >
    > The modesetting driver appears to be installed since it's part of the
    > xorg-x11-server-Xorg package, which is installed on my system. But
    > possibly not active. Where are instructions on how to find out whether
    > it's active and, if necessary, how to activate it?

    To list the drivers I do this (please note the "name:" entry):

    xrandr --listproviders
    Providers: number : 2
    Provider 0: id: 0x6f cap: 0xf, Source Output, Sink Output, Source
    Offload, Sink Offload crtcs: 3 outputs: 3 associated providers: 1
    name:modesetting
    Provider 1: id: 0x49 cap: 0xf, Source Output, Sink Output, Source
    Offload, Sink Offload crtcs: 6 outputs: 4 associated providers: 1
    name:PITCAIRN @ pci:0000:01:00.0

    If I'd see no modesetting info from the previous output I'd check
    config files in /etc/modprobe.d/ or /etc/default/grub (or wherever) that
    switch off modesetting

    I didn't find recent docs for Fedora re. this, but here's some info from
     Debian pages:

    --------------------
    To disable KMS for Intel and Radeon cards, either:
    Boot with the nomodeset kernel command line parameter. Edit
    /etc/modprobe.d/i915-kms.conf or /etc/modprobe.d/radeon-kms.conf
    accordingly.

    To disable KMS for nVidia cards, either:
    Boot with the nomodeset kernel command line parameter. Blacklist the
    nouveau kernel module, e.g. with
    echo blacklist nouveau > /etc/modprobe.d/blacklist-nouveau.conf
    and create a minimal /etc/X11/xorg.conf specifying the desired driver,
    e.g. [ ... ]


    Setting via Grub

    Configuring the KMS via Grub can be done via the
    /etc/default/grub  config file by doing something similar to the
    following: [  .... ]
    --------------

    The rest at:
    https://wiki.debian.org/KernelModesetting

    Again: some look to /etc/modprobe.d/ etc. might be useful

    This might be useful, too:
    https://wiki.debian.org/AtiHowTo


    HTH,
    Wolfgang

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