BBB, SGX and Qt 4.8.6 problems

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1

Hi guys,
since several days I’m trying to run a Qt OpenGL application on my Beaglebone Black.

I’ve installed the official Debian image (from Latest Software Images - BeagleBoard) on the micro sd (not emmc) and compiled and installed the 3.12 kernel from Robert C Nelson’s linux-dev git repository.
Then I ran the sgx-build-modules.sh script, which was also provided in Robert’s repository and copied it to the BBB, ran the install scripts for pvrsrv etc. (After changing this line https://github.com/RobertCNelson/linux-dev/blob/am33x-v3.12/sgx_build_modules.sh#L272 from “no” to “yes”) the graphics sdk examples ran properly (evilskull, etc.).

Now I’ve downloaded qt-4.8.6 and configured it with the correct mkspecs and this configure directive:

./configure -v -opensource -confirm-license -prefix /opt/qt -embedded arm -platform qws/linux-x86-g++ -xplatform qws/linux-am335x-g++ -depths 16,24,32 -no-mmx -no-3dnow -no-sse -no-sse2 -no-ssse3 -no-glib -no-cups -no-largefile -no-accessibility -no-openssl -no-gtkstyle -qt-mouse-pc -qt-mouse-linuxtp -qt-mouse-linuxinput -plugin-mouse-linuxtp -plugin-mouse-pc -fast -little-endian -host-big-endian -no-pch -no-sql-ibase -no-sql-mysql -no-sql-odbc -no-sql-psql -no-sql-sqlite -no-sql-sqlite2 -no-webkit -no-qt3support -nomake examples -nomake demos -nomake docs -nomake translations -qt-mouse-tslib -opengl es2 -plugin-gfx-powervr -D QT_NO_QWS_CURSOR -D QT_QWS_CLIENTBLIT

I used the same compiler which was downloaded with the kernel building script (gcc-linaro-arm-linux-gnueabihf-4.8-2013.10_linux). Everything configured and maked successfully. Then I copied the neccessary files (libs, plugins, examples) to the BBB.

But now the problems begin. When I want to run the hellogl_es example, it says “can’t create surface”:

debian@beaglebone:/opt/qt/examples/opengl/hellogl_es2$ sudo ./hellogl_es2 -qws -display powervr

QEglContext::createSurface(): Unable to create EGL surface, error = 0x300b

The program starts but only shows a completely green opengl surface (still, the graphics sdk examples run properly). I tried it with running and stopped lightdm, everytime I get the same error.

I think it’s a very simple step to get Qt OpenGL working, but I’ve tried everything without success. Maybe I’ve missed only a patch which isn’t currently in the linux-dev repository or anything?

Many thanks in advance!

Greetings,
Marcel

Here some additional information:

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Hi!

should not you apply the patch mentioned in the latest message here?
http://e2e.ti.com/support/arm/sitara_arm/f/791/t/164373.aspx

can you share your mkspecs file? i’m struggling to build qt 4.8.6 with hardfp compiler

3

Hi!
Wow, this is my lost first post! I didn’t found it after posting, so I’ve made a new one here https://groups.google.com/forum/embed/?place=forum/beagleboard&showsearch=true&showpopout=true&showtabs=true&hideforumtitle=true&parenturl=http%3A%2F%2Fbeagleboard.org%2FCommunity%2FForums#!category-topic/beagleboard/beaglebone-black/bZZ2Ly6FLFo .
I also didn’t receive any email notification. Very strange.

Nonetheless, I’ve just set up a blog and wrote down a tutorial to set up Qt 4.8.6 with hardfp. You can find it here: http://embedded.von-kannen.net/2014/05/21/qt-4-8-6-on-beaglebone-black/

Related to your idea with the patch: yes, I’ve applied the patch already, but that’s also not working. Just found out that there are is a newer patch at http://pastebin.com/p88wce2f. After applying this one (and little changes in mkspecs) the 2dpointer example gave output on the OpenGL side (but I had to run it without “-display powervr”). Every else example doesn’t work, either with -display powervr nor without it.

Do you know something more about it? Maybe you could try a little bit? Currently I’m feeling like I’m the only one who is trying to archive duly hardware acceleration in Qt. Btw, I archived to run SGX in kernel v3.8.13 and got rid of kernel v3.12 (don’t like it because of the bad cape support)

4

Hi!
Wow, this is my lost first post! I didn’t found it after posting, so I’ve made a new one here https://groups.google.com/forum/embed/?place=forum/beagleboard&showsearch=true&showpopout=true&showtabs=true&hideforumtitle=true&parenturl=http%3A%2F%2Fbeagleboard.org%2FCommunity%2FForums#!category-topic/beagleboard/beaglebone-black/bZZ2Ly6FLFo .
I also didn’t receive any email notification. Very strange.

You won’t receive a copy of your own post. This is the way Google Groups works.

5

Hmmmm. I have to think about that part where you say " Google Groups works". I am about to drown in SPAM!

Gerald

6

To keep Gerald, sane, is it time to make the list subscriber only? Or
maybe a good job for some summer interns.

Regards,

7

One of the issue is that the group has been “subscribing” to all these mailing lists. Go figure.

Now, if any one wants a walk in bathtub, a free doctorate degree, a free drug rehab center, or good thermal windows, please let me now and I can pass them along!

Gerald

8

Well, I didn’t saw my first post (this one) in the topic list and didn’t receive a message. After writing my second post, it came up in the topic list AND I received an e-mail (in both cases with activated e-mail subscription).

But I’d really appreciate it if we could stay on-topic.