failed to execvp: /usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess

[themroc]

kontact cannot start after upgrade to Noble on arm based Lenovo ThinkPad X13s:

Error Message in terminal:

LaunchProcess: failed to execvp:
/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess
LaunchProcess: failed to execvp:
/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess

Same error message when starting kmail.

Operating System: Kubuntu 24.04
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Kernel Version: 6.8.0-31-generic (64-bit)
Graphics Platform: X11
Processors: 4 × Unknown Type, 4 × ARM Cortex-A78C
Memory: 15.0 GiB of RAM
Graphics Processor: FD690
Product Name: Lenovo ThinkPad X13s
Manufacturer: LENOVO
Product Name: 21BX001MGE
System Version: ThinkPad X13s Gen 1

[Domain Administrator (493poc-ycm05-d18eca)]

Same for digikam 8.2.0 on fresh install of Kubuntu 24.04 on Raspberrypi 4B

(Ignore the Faces lines - this isn't enabled by default in digikam)

$ digikam
digikam.metaengine: ExifTool process cannot be started ( "" )
digikam.facedb: Cannot found faces engine model "shapepredictor.dat"
digikam.facedb: Faces recognition feature cannot be used!
digikam.facedb: Cannot found faces engine DNN model "openface_nn4.small2.v1.t7"
digikam.facedb: Faces recognition feature cannot be used!
LaunchProcess: failed to execvp:
/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess
LaunchProcess: failed to execvp:
/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess
Trace/breakpoint trap (core dumped)

~$ ls -l /usr/lib/aarch64-linux-gnu/qt5/libexec/
total 340
-rwxr-xr-x 1 root root 67512 Mar 29 13:12 QtWebEngineProcess
-rwxr-xr-x 1 root root 67672 Mar 28 10:04 QtWebNetworkProcess
-rwxr-xr-x 1 root root 67672 Mar 28 10:04 QtWebPluginProcess
-rwxr-xr-x 1 root root 67672 Mar 28 10:04 QtWebProcess
-rwxr-xr-x 1 root root 67672 Mar 28 10:04 QtWebStorageProcess

Operating System: Kubuntu 24.04
KDE Plasma Version: 5.27.11
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13
Kernel Version: 6.8.0-1004-raspi (64-bit)
Graphics Platform: X11
Processors: 4 × ARM Cortex-A72
Memory: 3.7 GiB of RAM
Graphics Processor: V3D 4.2.14
Product Name: Raspberry Pi 4 Model B Rev 1.1

[Domain Administrator (493poc-ycm05-d18eca)]

Add Akregator

~$ akregator
LaunchProcess: failed to execvp:
/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess
LaunchProcess: failed to execvp:
/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess
Trace/breakpoint trap (core dumped)

[Dmitry Shachnev (mitya57)]

What happens if you try to run /usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess directly from the terminal? It will probably fail, but with what error?

Also, can you please attach your /proc/cpuinfo file to this bug? Maybe Qt WebEngine needs some CPU features which are not available on your systems.

[themroc (rauchweihe)]

/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess
QWebEngine: OpenGL resource sharing is not set up in QtQuick. Please make sure to call QtWebEngine::initialize() in your main() function.
QWebEngine: OpenGL resource sharing is not set up in QtQuick. Please make sure to call QtWebEngine::initialize() in your main() function.
QWebEngine: OpenGL resource sharing is not set up in QtQuick. Please make sure to call QtWebEngine::initialize() in your main() function.
QWebEngine: OpenGL resource sharing is not set up in QtQuick. Please make sure to call QtWebEngine::initialize() in your main() function.
QWebEngine: OpenGL resource sharing is not set up in QtQuick. Please make sure to call QtWebEngine::initialize() in your main() function.
QWebEngine: OpenGL resource sharing is not set up in QtQuick. Please make sure to call QtWebEngine::initialize() in your main() function.
[3734:3744:0511/130055.500003:FATAL:gpu_data_manager_impl_private.cc(445)] GPU process isn't usable. Goodbye.
Trace/Breakpoint ausgelöst (Speicherabzug geschrieben)

[Dmitry Shachnev (mitya57)]

Thank you!

These errors are quite expected, they are because you run QtWebEngineProcess outside of the application. Unfortunately, they do not explain why the applications fail to launch this subprocess.

Also I compared the CPU flags with ones that I have on Debian’s ARM64 porterbox, and your system is missing only one (ssbs — Speculative Store Bypass Safe), but it should not be related.

Any ideas what else could be missing are welcome.

[Dmitry Shachnev (mitya57)]

One more idea (thanks Alfred from #ubuntu-qt). Can you please:

- Install strace package (if not installed yet).
- Run "strace -f akregator &>strace.txt" and wait for it to crash (it will be slow when running in strace).
- Either attach strace.txt here, or find the exit code of execve in the output and tell it.

For example, I have this:

[pid 2383148] execve("/usr/lib/x86_64-linux-gnu/qt5/libexec/QtWebEngineProcess", ["/usr/lib/x86_64-linux-gnu/qt5/li"..., "--type=zygote", "--no-zygote-sandbox", "--application-name=simplebrowser", "--webengine-schemes=qrc:sLV", "--lang=en"], 0x55898c63de80 /* 69 vars */ <unfinished ...>
[pid 2383148] <... execve resumed>) = 0

[Dmitry Shachnev (mitya57)]

Thank you, so here we go:

> execve("/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess", ["/usr/lib/aarch64-linux-gnu/qt5/l"..., "--type=zygote", "--disable-in-process-stack-trace"..., "--application-name=akregator", "--webengine-schemes=qrc:sLV", "--lang=de"], 0xc5a2432bb180 /* 70 vars */) = -1 EPERM (Vorgang nicht zulässig)

This may be because of AppArmor restrictions. Can you try to disable AppArmor using these commands and see if it helps?

sudo sysctl -w kernel.apparmor_restrict_unprivileged_unconfined=0
sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0

To re-enable it back, you can use the same commands but with 1 instead of 0.

[themroc (rauchweihe)]

Unfortunately it does not work:

mirko@erle:~$ sudo sysctl -w kernel.apparmor_restrict_unprivileged_unconfined=0
[sudo] Passwort für mirko:
kernel.apparmor_restrict_unprivileged_unconfined = 0
mirko@erle:~$ sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
kernel.apparmor_restrict_unprivileged_userns = 0
mirko@erle:~$ akregator
LaunchProcess: failed to execvp:
/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess
LaunchProcess: failed to execvp:
/usr/lib/aarch64-linux-gnu/qt5/libexec/QtWebEngineProcess
Trace/Breakpoint ausgelöst (Speicherabzug geschrieben)

[themroc (rauchweihe)]

I remember that Akregator also crashed in Mantic, but Kontact and Kmail worked.
That's why I created the strace of kmail and kontact again.
But the error looks identical here.

[Dmitry Shachnev (mitya57)]

We have finally found the problem (thanks Scarlett Moore). The apparmor profiles of Akregator, Kontact and Digikam have x86_64-linux-gnu hardcoded in the path for QtWebEngineProcess. So reassigning to those 3 packages.

[themroc (rauchweihe)]

falkon works for me.

[Launchpad Janitor (janitor)]

This bug was fixed in the package kontact - 4:23.08.5-0ubuntu5

---------------
kontact (4:23.08.5-0ubuntu5) oracular; urgency=medium

  * Set @{multiarch} rather than hard code path. (LP: #2064492)

 -- Scarlett Moore <email address hidden> Thu, 16 May 2024 04:55:59 -0700

[Launchpad Janitor (janitor)]

This bug was fixed in the package akregator - 4:23.08.5-0ubuntu5

---------------
akregator (4:23.08.5-0ubuntu5) oracular; urgency=medium

  * Set @{multiarch} rather than hard code path. (LP: #2064492)

 -- Scarlett Moore <email address hidden> Thu, 16 May 2024 05:03:29 -0700

[Launchpad Janitor (janitor)]

This bug was fixed in the package kmail - 4:23.08.5-0ubuntu6

---------------
kmail (4:23.08.5-0ubuntu6) oracular; urgency=medium

  * Set @{multiarch} rather than hard code path. (LP: #2064492)

 -- Scarlett Moore <email address hidden> Thu, 16 May 2024 07:14:20 -0700

[Launchpad Janitor (janitor)]

This bug was fixed in the package marble - 4:23.08.5-0ubuntu4

---------------
marble (4:23.08.5-0ubuntu4) oracular; urgency=medium

  * Set @{multiarch} rather than hard code path. (LP: #2064492)

 -- Scarlett Moore <email address hidden> Thu, 16 May 2024 07:24:13 -0700

[Launchpad Janitor (janitor)]

This bug was fixed in the package kalgebra - 4:23.08.5-0ubuntu5

---------------
kalgebra (4:23.08.5-0ubuntu5) oracular; urgency=medium

  * Set @{multiarch} rather than hard code path. (LP: #2064492)

 -- Scarlett Moore <email address hidden> Thu, 16 May 2024 07:00:35 -0700

[Launchpad Janitor (janitor)]

This bug was fixed in the package konqueror - 4:23.08.5-0ubuntu4

---------------
konqueror (4:23.08.5-0ubuntu4) oracular; urgency=medium

  * Set @{multiarch} rather than hard code path. (LP: #2064492)

 -- Scarlett Moore <email address hidden> Thu, 16 May 2024 07:20:42 -0700

[Launchpad Janitor (janitor)]

This bug was fixed in the package cantor - 4:23.08.5-0ubuntu5

---------------
cantor (4:23.08.5-0ubuntu5) oracular; urgency=medium

  * Set @{multiarch} rather than hard code path. (LP: #2064492)

 -- Scarlett Moore <email address hidden> Thu, 16 May 2024 05:20:21 -0700

[Launchpad Janitor (janitor)]

This bug was fixed in the package tellico - 3.5.4-1ubuntu2

---------------
tellico (3.5.4-1ubuntu2) oracular; urgency=medium

  * Set @{multiarch} rather than hard code path. (LP: #2064492)

 -- Scarlett Moore <email address hidden> Thu, 16 May 2024 07:34:15 -0700

[themroc (rauchweihe)]

Thanks for the bug fixes!
Will the fixes soon be distributed via the noble updates, or will we have to wait until the next upgrade to oracular?

[Scarlett Gately Moore (scarlettmoore)]

Unfortunately they have to make to development release first and tested. Once it passes that, I have the Sru prepared to release it to noble updates and 24.04.1 release. Another unfortunate is I don't have upload rights to half of them so I am waiting on tsimonq2 to upload them. Thanks for your patience.

[themroc (rauchweihe)]

Thank you for your efforts.
I will wait patiently. I was just afraid of having to go without Kontact/Kmail until fall :)