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SubjectRe: [PATCH 2/3] drm/nouveau/kms/nv50-: Report max cursor size to userspace
Ilia Mirkin, Tue, Feb 23, 2021 16:46:52 +0100:
> On Tue, Feb 23, 2021 at 10:36 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > Ilia Mirkin, Tue, Feb 23, 2021 15:56:21 +0100:
> > > On Tue, Feb 23, 2021 at 9:26 AM Alex Riesen <alexander.riesen@cetitec.com> wrote:
> > > >
> > > > This change broke X cursor in my setup, and reverting the commit restores it.
> > > >
> > > > Dell Precision M4800, issue ~2014 with GK106GLM [Quadro K2100M] (rev a1).
> > > > libdrm 2.4.91-1 (Debian 10.8 stable).
> > > > There are no errors or warnings in Xorg logs nor in the kernel log.
> > >
> > > Could you confirm which ddx is driving the nvidia hw? You can find
> > > this out by running "xrandr --listproviders", or also in the xorg log.
> >
> > xrandr(1) does not seem to list much:
> >
> > $ xrandr --listproviders
> > Providers: number : 1
> > Provider 0: id: 0x48 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 4 outputs: 5 associated providers: 0 name:modesetting
>
> Thanks - this is what I was looking for. name:modesetting, i.e. the
> modesetting ddx driver.
>
> I checked nouveau source, and it seems like it uses a 64x64 cursor no
> matter what. Not sure what the modesetting ddx does.
>
> I'd recommend using xf86-video-nouveau in any case, but some distros

I would like try this out. Do you know how to force the xorg server to
choose this driver instead of modesetting?

> have decided to explicitly force modesetting in preference of nouveau.
> Oh well. (And regardless, the regression should be addressed somehow,
> but it's also good to understand what the problem is.)
>
> Can you confirm what the problem with the cursor is?

The cursor looks stretched vertically over a bigger matrix, while missing some
lines and being wrapped over the bottom on top of that matrix.

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