Re: LLVM 7.0 + Wayland = broken mouse control

From: mikhail <mikhail.v.gavrilov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: "Olsak, Marek" <Marek.Olsak-5C7GfCeVMHo@public.gmane.org>,
	"Daenzer, Michel" <Michel.Daenzer-5C7GfCeVMHo@public.gmane.org>
Cc: "amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org"
	<amd-gfx-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org>,
	gpudriverdevsupport
	<gpudriverdevsupport-5C7GfCeVMHo@public.gmane.org>
Subject: Re: LLVM 7.0 + Wayland = broken mouse control
Date: Tue, 30 Jan 2018 00:58:35 +0500	[thread overview]
Message-ID: <1517255915.3374.5.camel@gmail.com> (raw)
In-Reply-To: <BN4PR12MB08811DCADDC96DEDCAF61659F9E20-aH9FTdWx9BZt7gBpLs4TlwdYzm3356FpvxpqHgZTriW3zl9H0oFU5g@public.gmane.org>

On Mon, 2018-01-29 at 19:18 +0100, Marek Olšák wrote:
> Please report this issue to the gnome-shell team. gnome-shell has a
> bug in how they handle (or ignore) 10-bits-per-channel visuals.

I already reported here: 
https://gitlab.gnome.org/GNOME/mutter/issues/2

> The workaround is to set the environment variable
> "allow_rgb10_configs=false" for gnome-shell.

I added environment variable as you said:
# echo "allow_rgb10_configs=false" > /etc/profile.d/gnome-workaround.sh
But it not helps workaround problem.
Maybe we made a mistake in the diagnosis?

On Wed, 2018-01-24 at 16:45 +0000, Olsak, Marek wrote:
> Note that gnome-shell has a bug that if the driver supports 10bit
> formats, incorrect drawing and wrong colors and/or corruption occur.
> All drivers that say that they support 10bit formats won't work with
> gnome-shell very well.
> 
> My position on this issue is to keep Mesa as-is, leaving gnome-shell
> broken, so that gnome-shell developers are alerted and fix their
> code. If we react by removing 10bit support from drivers, the odds
> are gnome-shell will never be fixed and drivers will never be able to
> have 10bit support in them.
> 
> Marek
> 
> From: Daenzer, Michel
> Sent: Wednesday, January 24, 2018 11:33:49 AM
> To: Mikhail Gavrilov
> Cc: gpudriverdevsupport
> Subject: Re: LLVM 7.0 + Wayland = broken mouse control
>  
> 
> On 2018-01-24 11:10 AM, Mikhail Gavrilov wrote:
> > Hi.
> > Anybody already tryied LLVM 7 and Wayland???
> > After LLVM is updated in repo
> > https://copr.fedorainfracloud.org/coprs/che/mesa/ to 7.0.0-
> 0.1.r322132
> > mouse hover are stop working on all controls. It means I unnable
> > launch application by clicking on application icon also I unnable
> drag
> > and resize windows. And all controls are unclickable. But keyboard
> > works fine.
> 
> This sounds like the known gnome-shell/mutter bugs related to 10
> bits 
> per component colour formats. I.e. it's probably not directly related
> to 
> LLVM but to changes in how Mesa exposes such formats to applications.
> 
> 
> P.S. Please send this kind of inquiry to the amd-gfx mailing list 
> instead of this address.
> 
> 
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