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Re: glamor / xf86-video-modesetting wrote:
>So, xf86-video-intel has issues on old GMA cards with SNA.
>xf86-video-modesetting doesn't share those issues, but requires glamor
>to be performant.
>I thought I'd have another look, this time with a radeon HD5450.
>adding this /etc/xorg.conf:
>Section "Device"
>	Identifier    "Configured Video Device"
>	Driver        "modesetting"
>Surprisingly, glamor is already attempted out of the box
>(II) modeset(0): glamor X acceleration enabled on AMD CEDAR (DRM 2.43.0 / 10.0.59, LLVM 9.0.0)
>Unfortunately it has very violent display issues (text in terminal looks
>wrong, glxgears doesn't display anything).
>Looking at the warnings,
>(WW) modeset(0): DRI2: glamor lacks support for pixmap import/export
>Apparently this is a warning that occurs when dri3 is not enabled.
>So I'm taking back my hints to others that we should work on
>xf86-video-modesetting for a while. Will have to DRM update first.

I realize that you want to fix the modesetting driver but I'm typing
this on a machine with a Radeon 5450 and it seems fine with the
radeon driver, including running glxgears.

I also have some debug printfs in the drm library that I added to try to
see what firefox was doing, glxgears ends up calling drm2_create_context.

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