[Nouveau] [Bug 98631] GPU lock ups when starting GDM, SDDM, and Plasma Desktop

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=98631

--- Comment #4 from poma <pomidorabelisima at gmail.com> ---
Apropos Xfce 4.12, notice two variants of the Xfwm4:

= Xfwm4 4.12.3 "released" - Xrender driven compositor,
  it can be run on virtually any machine

$ xfwm4 --version
        ...
        Build configuration and supported features:
        - Render support:                               Yes
        - Embedded compositor:                          Yes


= Xfwm4 "not released" - GL(X) driven compositor,
  https://git.xfce.org/xfce/xfwm4/commit/?id=fee08ea
  it can run on NV50 family (Tesla),
  https://nouveau.freedesktop.org/wiki/CodeNames/#NV50
  on e.g. NV30 is slow, i.e. not very useful,
  although it may have to do with the performance of the CPU.

$ xfwm4 --version
        ...
        Build configuration and supported features:
        - Embedded compositor:                          Yes
        - Epoxy support:                                Yes



LightDM GTK+ Greeter (lightdm-gtk-greeter) is not accelerated,
therefore it can be run on virtually any machine.


KF5/KDE5 i.e. KWin also provides two variants of the compositor, GL and XRender
driven.


One important difference is that Xrender driven compositors aren't tear-free.

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