Users of x11-drivers/xf86-video-ati-legacy

[Andrea Venturoli]

On 2020-04-12 09:54, Andrea Venturoli wrote:
> On 2020-04-11 16:43, Andrea Venturoli wrote:
> 
> Some more info as I investigate:

I tried some debugging and what I think is happening is that the root 
windows get created and painted black (through pixman, with SSE 
instructions).
However at about 300kB into the buffer (which should be around 900kB) 
that segfaults.
Is it possible that the memory is allocated wrong/in the wrong place?

I went into the BIOS: I can choose to use the GPU's own memory, memory 
shared from main RAM or both. Also if memory should be mapped below or 
above 4G.
Those settings do not seem to make any difference, however.


The above is with drm-kmod-legacy (or drm from base).

xf86-video-ati-legacy seems to work with drm-fbsd12.0-kmod, instead 
(which, OTOH gives different problems).



To recap the various combinations.

With X.Org 1.19.6 + drm from base + xf86-video-ati-legacy everything 
worked fine.

Now on to 1.20.8, drm from base or drm-kmod-legacy + 
xf86-video-ati-legacy: I get a crash.

Moving to drm-fbsd12.0-kmod, I completely lose HDMI output and DVI 
output doesn't work properly (screen flashes continuously, unless I 
reduce full resolution): I have to use VGA output (sigh).

I also tried xf86-video-ati (non legacy): everything seems the same, 
except the machine will sometimes hang.
(I have not experienced an hang *yet* with xf86-video-ati, but it's been 
to short a time to conclude anything).



So I guess your patch works, at least in some cases. It's possible the 
problems I'm having are not due to xf86-video-ati-legacy, but to some 
other component.

  bye & Thanks
	av.