RE: Wayland Weston blank screen with drm-backend

[John Frankish]

> > > Using mesa-18.0.0, Wayland-1.14 and Weston 3.0.0 I get a blank 
> > > screen on a machine with intel hd4400 graphics when staring with:
> > >
> > > WAYLAND_DEBUG=1 EGL_LOG_LEVEL=debug XDG_RUNTIME_DIR=/run/user/$(id 
> > > -u) weston-launch >weston.log 2>&1
> > > 
> > > X works fine and, a couple of mesa upgrades ago, Weston worked fine 
> > > - full output log attached, any troubleshooting suggestions would be 
> > > appreciated.
> > > 
> > Ah - it seems it is due to using "--with-cairo=glesv2" rather than 
> > "--with-cairo=image", but why?
> > 
> the glesv2 option has been discouraged for years, so no-one tests it.
> It's no surprise it's broken. You can see configure.ac warning you about it 
> since May 2015.
> 
> It only exists so that one could theoretically build the couple demo programs 
> that actually need it. > It's been a wish to rewrite those demos to not need 
> it, since the demos themselves are
> still valuable, but no-one has had the time for it. That's also why the 
> option has not been
> completely removed yet.
> 
Thanks for the explanation :)

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Re: Wayland Weston blank screen with drm-backend

[Pekka Paalanen]

On Wed, 11 Apr 2018 08:35:22 +
John Frankish  wrote:

> > Using mesa-18.0.0, Wayland-1.14 and Weston 3.0.0 I get a blank screen on a 
> > machine with intel
> > hd4400 graphics when staring with:
> > 
> > WAYLAND_DEBUG=1 EGL_LOG_LEVEL=debug XDG_RUNTIME_DIR=/run/user/$(id -u) 
> > weston-launch >weston.log 2>&1
> > 
> > X works fine and, a couple of mesa upgrades ago, Weston worked fine - full 
> > output log attached,
> > any troubleshooting suggestions would be appreciated.
> >   
> Ah - it seems it is due to using "--with-cairo=glesv2" rather than 
> "--with-cairo=image", but why?

Hi,

the glesv2 option has been discouraged for years, so no-one tests it.
It's no surprise it's broken. You can see configure.ac warning you
about it since May 2015.

It only exists so that one could theoretically build the couple demo
programs that actually need it. It's been a wish to rewrite those demos
to not need it, since the demos themselves are still valuable, but
no-one has had the time for it. That's also why the option has not been
completely removed yet.


Thanks,
pq


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RE: Wayland Weston blank screen with drm-backend

[John Frankish]

> Using mesa-18.0.0, Wayland-1.14 and Weston 3.0.0 I get a blank screen on a 
> machine with intel
> hd4400 graphics when staring with:
> 
> WAYLAND_DEBUG=1 EGL_LOG_LEVEL=debug XDG_RUNTIME_DIR=/run/user/$(id -u) 
> weston-launch >weston.log 2>&1
> 
> X works fine and, a couple of mesa upgrades ago, Weston worked fine - full 
> output log attached,
> any troubleshooting suggestions would be appreciated.
> 
Ah - it seems it is due to using "--with-cairo=glesv2" rather than 
"--with-cairo=image", but why?

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