could not find qtplatfom plugin eglfs

Asha

I have Qt folder ,in my laptop here /home/beagle/Qt5ForBBB1

And I copied,it just as like this

scp -r Qt5ForBBB1 debian@192.168.7.2:Qt5ForBBB1...

is it correct? or I need to copy like this

scp -r /home/beagle/Qt5ForBBB1 debian@192.168.7.2:Qt5ForBBB1

Ketank16

Even if you don't have the Qt folder on beaglebone at same location, you can export the following environment variables on BBB and be able to run your Qt application in it.

export QT_QPA_PLATFORM_PLUGIN_PATH=/home/debian/(Qt folder name)/plugins/platforms
export LD_LIBRARY_PATH="/home/debian/(Qt folder name)/lib":$LD_LIBRARY_PATH
export QT_PLUGIN_PATH=/home/debian/(Qt folder name)/plugins
export QT_QPA_FONTDIR=/home/debian/(Qt folder name)/lib/fonts

Main thing you need to check is do you have eglfs as platform in the first place? Because I'm working on a BBB myself, and my application isn't in critical need of eglfs, but normally with BBB sysroot and linaro toolchain combo, you don't get eglfs working. You should check the path /home/debian/(Qt folder name)/plugins/platforms before using any app whether you have a library for eglfs there. If you do, then the commands above will point the Qt application to right folder and it will detect eglfs as platform plugin.

Asha

@Ketank16

Hi,

I have the platforms

linuxfb, minimal, offscreen,and vnc,

And exported platform also
export_QT_QPA_PLATFORM=vnc(because i also have vnc)

As you said I already export those things,which you mentioned,

After that in .pro file added the line

target.path=$$[Qt5ForBBB]/bin
INSTALLS += target

After this, running the application, getting the error

rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1207) [sender=3.1.3]..

exactly same error i got in BBB folder(means I followed your pdf document, same as you said i created one BBB directory, and gave the command rsync -avz debian@192.168.7.2:/usr sysroot ,in there also i got same error,but I continued next process as you mentioned in your pdf along with this error)

how to solve this rsync error,please suggest me(even I am installed debian on external hard drive,and trying or following those steps in external hard drive,but while running this command rsync -avz debian@192.168.7.2:/usr sysroot,getting same error).

how do I solve this error?

SGaist

Why are you copying stuff in /usr ? The debian user likely doesn't have write access there.

Asha

@SGaist Hi,

then where i need to copy?

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

then where i need to copy?

Home directory of the user

Asha

@jsulm

rsync -avz debian@192.168.7.2:/usr sysroot

Here,I am synchronizing the sysroot from board to computer,

so,Home directory to the user means ,I need to give like this
rsync -avz debian@192.168.7.2:/usr /home/beagle/BBB/sysroot

OR

rsync -avz debian@192.168.7.2:/usr /home/beagle

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

rsync -avz debian@192.168.7.2:/usr /home/beagle/BBB/sysroot
OR
rsync -avz debian@192.168.7.2:/usr /home/beagle

Well, if you use /home/beagle you will pollute your home directory with the sysroot content, so use /home/beagle/BBB/sysroot ...

Asha

@jsulm Hi,

After giving this,getting the same error,there is no changes..

Asha

@Ketank16 Hi,

can you please show me the, any .pro file,

I am very confused with this target.path file..

I followed this..

here is my .pro file target.pro.png

what i gave target.path, is it correct?

if its correct I am getting the error as shown in screenshot,

for that error solution ,I gave all the rights(rwx) to the /home/beagle/Qt5.13.1 directory then also getting the same error,any suggestions please....

Asha

Hi,

Any ideas?

Pablo J. Rogina

@Asha I think the problem is the $$[Qt5] placeholder in the value for target.path variable in your .pro
what if you just make it simple as target.path=/home/beagle/Qt5.13.1

PS: please STOP pasting pictures and just paste TEXT so it's easier for others to reference your posts...

Asha

@Pablo-J-Rogina

Good morning ,

Thanks for the replay,

After giving /home/beagle/Qt5.13.1 in my .pro file also getting the same problem...

Here is the compile output:

10:22:04: Running steps for project concentriccircles...
10:22:04: Configuration unchanged, skipping qmake step.
10:22:04: Starting: "/usr/bin/make" -j4
make: Nothing to be done for 'first'.
10:22:04: The process "/usr/bin/make" exited normally.
10:22:04: Connecting to device "Generic Linux Device" (192.168.7.2).
10:22:08: The remote file system has 49 megabytes of free space, going ahead.
10:22:08: Deploy step finished.
10:22:08: Trying to kill "/home/beagle/Qt5.13.1/concentriccircles" on remote device...
10:22:11: Remote application killed.
10:22:11: Deploy step finished.
10:22:11: Failed to create remote directories: mkdir: cannot create directory ‘/home/beagle’: Permission denied

10:22:11: Deploy step failed.
Error while building/deploying project concentriccircles (kit: BBB)
When executing step "Deploy files via rsync"
10:22:11: Elapsed time: 00:07.

jsulm

@Asha Does /home/beagle directory exist on your device?

Asha

@jsulm

/home/beagle does not exit on my device,
I installed Qt in my laptop(location is: /home/beagle/Qt5.13.1)

I copied the cross compiled qt in my device(location is : /home/debian/Qt5),

one more thing,I want to tell

my user password is :1234

I am trying to connect ssh via root,but giving the password 1234 ,I am not able to connect with my board ,getting the permission denied error,

but giving the password "ims1" ,I am able to login via root,
where "ims1" is my old user password ,is this may cause any issues?

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

/home/beagle does not exit on my device

Well, that's the problem: only root has write access in /home.
Why do you use /home/beagle if your user is debian?!
Use /home/debian ...

Asha

@jsulm

while giving the /home/debian

here is the compile output:
11:13:06: Running steps for project concentriccircles...
11:13:06: Configuration unchanged, skipping qmake step.
11:13:06: Starting: "/usr/bin/make" -j4
make: Nothing to be done for 'first'.
11:13:06: The process "/usr/bin/make" exited normally.
11:13:06: The remote file system has 46 megabytes of free space, going ahead.
11:13:06: Deploy step finished.
11:13:06: Trying to kill "/home/debian/Qt5/concentriccircles" on remote device...
11:13:08: Remote application killed.
11:13:08: Deploy step finished.
11:13:08: sending incremental file list

11:13:08:
sent 72 bytes received 12 bytes 168.00 bytes/sec
total size is 1,576,416 speedup is 18,766.86

11:13:08: Deploy step finished.
11:13:08: Elapsed time: 00:03.

And

Application output is:

11:13:09: Starting /home/debian/Qt5/concentriccircles ...
qt.qpa.plugin: Could not find the Qt platform plugin "eglfs" in ""
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: linuxfb, minimal, offscreen, vnc.

11:13:09: Remote process crashed.

jsulm

@Asha said in could not find qtplatfom plugin eglfs:

linuxfb, minimal, offscreen, vnc

Looks like you did not build eglfs support when building Qt

Asha

@jsulm
but other platforms like linuxfb and vnc both are enabled while building qt,

And I exported linuxfb in my device...

one more ,while building I tried with -eglfs option also but got the error like

ERROR: 'eglfs' already enabled...

jsulm

@Asha What do you actually want to use? eglfs? linuxfb? ...?
Adding -eglfs is not going to help as it is already activated, but your Qt build does not support it.