[gentoo-user] Qt Creator on start up - "Welcome Mode Load Error"

[gentoo-user] Qt Creator on start up - "Welcome Mode Load Error"

[Andrew Lowe]

Hi all,
	I've got the latest portage available, V3.4.1, Qt Creator installed.
When I go to start up creator, I get a full screen window frame popping
up, some menu and icon bars around the edge and then, instead of the
text edit pane, I get a "clear" window, I can see the screens wallpaper,
and three dialogues popping up. These dialogues are titled "Welcome Mode
Load Error" and look like the top paragraph of the dialogue shown here:
http://tinyurl.com/o9ax8ml - yes I know this is for a windows bug, but
the dialogue is the same.

	I've tried to track down on the Qt site what the minimal Qt
requirements for Creator are but that was useless - can't find it
anywhere. I then had a look at the Creator ebuild and it says:

# minimum Qt version required
38 	QT_PV="5.3.2:5"

This is where it gets interesting. I have not made the jump to Qt 5, but
I can remember a large Qt update recently that had "5" bobbing past
occasionally during the compile process. It was something that I meant
to follow up but haven't. Doing an "eix qt | grep Installed" reveals
that I have a mix of 4.8.7 and 5.4.2. Doing "emerge --info | grep qt"
reveals only "qt3support" and "qt4". No mention of "qt5".

	As this is to do with OpenGl, but I actually suspect this mismatch of
Qt, "eselect opengl list" says nvidia is selected. Re-emerging
nvidia-drivers also says:

***************

* >>> SetUID: [chmod go-r] /opt/bin/nvidia-modprobe ...[ ok ]
Switching to nvidia OpenGL interface... done
 * Removing x11-drivers/nvidia-drivers-352.21 from moduledb.
Switching to nvidia OpenGL interface... done
 * Updating module dependencies for 4.0.5-gentoo ...[ ok ]
 * Adding module to moduledb.
Switching to nvidia OpenGL interface... done
Switching to nvidia OpenCL interface... done
 * USE=tools controls whether the nvidia-settings application
 * is installed. If you would like to use it, enable that
 * flag and re-emerge this ebuild. Optionally you can install
 * media-video/nvidia-settings

***************
So it appears OpenGl is good to go.

	Does anyone have any ideas as to how I can get back to a "pure" Qt4
setup? I've just had a look in /usr/portage/profiles/use.desc and there
is a qt5 in there. Should I do a "-qt5" in make.conf and a new "emerge
-NuD world"?

	Regards,
		Andrew

p.s. Whoever looks after the wiki,

https://wiki.gentoo.org/wiki/Handbook:X86/Working/USE

the section "What USE flags exist" has two links to supposedly online
description - no they don't.

[gentoo-user] Re: Qt Creator on start up - "Welcome Mode Load Error"

[walt]

On 06/21/2015 07:38 AM, Andrew Lowe wrote:
> I then had a look at the Creator ebuild and it says:
> 
> # minimum Qt version required
> 38 	QT_PV="5.3.2:5"

Only qt-creator-3.4.1 requires qt5, so your fix would be to install one of
the earlier versions of qt-creator.

Are you trying to mix stable and unstable packages, maybe?  (I do this all
the time knowing that I will have problems like the one you describe but I
do it anyway.  No fool like and old fool, etc.

Re: [gentoo-user] Re: Qt Creator on start up - "Welcome Mode Load Error"

[Andrew Lowe]

On 06/22/2015 07:29 AM, walt wrote:
> On 06/21/2015 07:38 AM, Andrew Lowe wrote:
>> I then had a look at the Creator ebuild and it says:
>>
>> # minimum Qt version required
>> 38 	QT_PV="5.3.2:5"
> 
> Only qt-creator-3.4.1 requires qt5, so your fix would be to install one of
> the earlier versions of qt-creator.
> 
> Are you trying to mix stable and unstable packages, maybe?  (I do this all
> the time knowing that I will have problems like the one you describe but I
> do it anyway.  No fool like and old fool, etc.
> 
> 
> 
Walt,
	You were right. Killed of the latest version and installed V3.2.2 which
depends upon the latest in the Qt4 series. Did have some nasty problems
vis a vis webkit but finally got there.

	Thanks,
		Andrew
		

Re: [gentoo-user] Re: Qt Creator on start up - "Welcome Mode Load Error"

[Christopher Jones]

I have 4.8.7 and 5.4.1 installed and qt-creator 3.4.0 on mine. 

Sent from my iPhone

> On Jun 22, 2015, at 9:31 AM, Andrew Lowe <agl@wht.com.au> wrote:
> 
>> On 06/22/2015 07:29 AM, walt wrote:
>>> On 06/21/2015 07:38 AM, Andrew Lowe wrote:
>>> I then had a look at the Creator ebuild and it says:
>>> 
>>> # minimum Qt version required
>>> 38    QT_PV="5.3.2:5"
>> 
>> Only qt-creator-3.4.1 requires qt5, so your fix would be to install one of
>> the earlier versions of qt-creator.
>> 
>> Are you trying to mix stable and unstable packages, maybe?  (I do this all
>> the time knowing that I will have problems like the one you describe but I
>> do it anyway.  No fool like and old fool, etc.
> Walt,
>    You were right. Killed of the latest version and installed V3.2.2 which
> depends upon the latest in the Qt4 series. Did have some nasty problems
> vis a vis webkit but finally got there.
> 
>    Thanks,
>        Andrew
>        
>