Gentoo Archives: gentoo-user

From: Andrew Lowe <agl@×××××××.au>
To: gentoo-user@l.g.o
Subject: [gentoo-user] Qt Creator on start up - "Welcome Mode Load Error"
Date: Sun, 21 Jun 2015 14:38:27
1 Hi all,
2 I've got the latest portage available, V3.4.1, Qt Creator installed.
3 When I go to start up creator, I get a full screen window frame popping
4 up, some menu and icon bars around the edge and then, instead of the
5 text edit pane, I get a "clear" window, I can see the screens wallpaper,
6 and three dialogues popping up. These dialogues are titled "Welcome Mode
7 Load Error" and look like the top paragraph of the dialogue shown here:
8 - yes I know this is for a windows bug, but
9 the dialogue is the same.
11 I've tried to track down on the Qt site what the minimal Qt
12 requirements for Creator are but that was useless - can't find it
13 anywhere. I then had a look at the Creator ebuild and it says:
15 # minimum Qt version required
16 38 QT_PV="5.3.2:5"
18 This is where it gets interesting. I have not made the jump to Qt 5, but
19 I can remember a large Qt update recently that had "5" bobbing past
20 occasionally during the compile process. It was something that I meant
21 to follow up but haven't. Doing an "eix qt | grep Installed" reveals
22 that I have a mix of 4.8.7 and 5.4.2. Doing "emerge --info | grep qt"
23 reveals only "qt3support" and "qt4". No mention of "qt5".
25 As this is to do with OpenGl, but I actually suspect this mismatch of
26 Qt, "eselect opengl list" says nvidia is selected. Re-emerging
27 nvidia-drivers also says:
29 ***************
31 * >>> SetUID: [chmod go-r] /opt/bin/nvidia-modprobe ...[ ok ]
32 Switching to nvidia OpenGL interface... done
33 * Removing x11-drivers/nvidia-drivers-352.21 from moduledb.
34 Switching to nvidia OpenGL interface... done
35 * Updating module dependencies for 4.0.5-gentoo ...[ ok ]
36 * Adding module to moduledb.
37 Switching to nvidia OpenGL interface... done
38 Switching to nvidia OpenCL interface... done
39 * USE=tools controls whether the nvidia-settings application
40 * is installed. If you would like to use it, enable that
41 * flag and re-emerge this ebuild. Optionally you can install
42 * media-video/nvidia-settings
44 ***************
45 So it appears OpenGl is good to go.
47 Does anyone have any ideas as to how I can get back to a "pure" Qt4
48 setup? I've just had a look in /usr/portage/profiles/use.desc and there
49 is a qt5 in there. Should I do a "-qt5" in make.conf and a new "emerge
50 -NuD world"?
52 Regards,
53 Andrew
55 p.s. Whoever looks after the wiki,
59 the section "What USE flags exist" has two links to supposedly online
60 description - no they don't.


Subject Author
[gentoo-user] Re: Qt Creator on start up - "Welcome Mode Load Error" walt <w41ter@×××××.com>