Could you give a try at https://wiki.documentfoundation.org/QA/FirstSteps (except profile part since you've already tested)?

If you still reproduce this, would it be possible you attach a backtrace? (see https://wiki.documentfoundation.org/QA/BugReport/Debug_Information#GNU.2FLinux:_How_to_get_a_backtrace)

Ok. here it is:

- i upgraded to 6.4.7 using ppa:libreoffice/libreoffice-6-4
- used renderer is "default", so it's not a graphics issue
- it's not Calc, so no OpenCL issue

- I generated a backtrace which will be attached

Created attachment 168330 [details]
gdbtrace.log

2 things you can try:
1) Open console/terminal and type:
export SAL_USE_VCLPLUGIN=gen && soffice --draw
then try to reproduce the crash.
If you don't reproduce the crash, you'll got a workaround.

2) Since 6.4.7 is the last official release from 6.4 branch and there won't be a new one in this branch, you can give a try to 7.0.4 rc2 (from LO ppa too).

(In reply to Julien Nabet from comment #4)
> 2 things you can try:
> 1) Open console/terminal and type:
> export SAL_USE_VCLPLUGIN=gen && soffice --draw
> then try to reproduce the crash.
> If you don't reproduce the crash, you'll got a workaround.
> 

With that property it crashed, too. Unfortunately I lost the backtrace, because it was in /tmp and then I rebooted. Maybe I can retry it after downgrading Libreoffice again

> 2) Since 6.4.7 is the last official release from 6.4 branch and there won't
> be a new one in this branch, you can give a try to 7.0.4 rc2 (from LO ppa
> too).

Now I cannot start LibreOffice 7.0 anymore;

- either I get:

$ export SAL_USE_VCLPLUGIN= && soffice --draw
terminate called after throwing an instance of 'com::sun::star::uno::RuntimeException'


Fatal exception: Signal 6
Stack:
/usr/lib/libreoffice/program/libuno_sal.so.3(+0x3e843)[0x7f4b47cb6843]
/usr/lib/libreoffice/program/libuno_sal.so.3(+0x3e9ba)[0x7f4b47cb69ba]
/lib/x86_64-linux-gnu/libc.so.6(+0x46210)[0x7f4b47a96210]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7f4b47a9618b]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7f4b47a75859]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x9e951)[0x7f4b44c42951]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa47c)[0x7f4b44c4e47c]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa4e7)[0x7f4b44c4e4e7]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa799)[0x7f4b44c4e799]
/usr/lib/libreoffice/program/libmergedlo.so(+0xeebe18)[0x7f4b48bcae18]
/usr/lib/libreoffice/program/libmergedlo.so(+0x14edc0d)[0x7f4b491ccc0d]
/usr/lib/libreoffice/program/libmergedlo.so(+0x150b1d2)[0x7f4b491ea1d2]
/usr/lib/libreoffice/program/libmergedlo.so(+0x2cfc5bd)[0x7f4b4a9db5bd]
/usr/lib/libreoffice/program/libmergedlo.so(+0x2cfc89a)[0x7f4b4a9db89a]
/usr/lib/libreoffice/program/libmergedlo.so(_ZN3utl10ConfigItemC2ERKN3rtl8OUStringE14ConfigItemMode+0x82)[0x7f4b4a9d5532]
/usr/lib/libreoffice/program/libmergedlo.so(+0x2d36b16)[0x7f4b4aa15b16]
/usr/lib/libreoffice/program/libmergedlo.so(_ZN19SvtSysLocaleOptionsC1Ev+0x129)[0x7f4b4aa16fb9]
/usr/lib/libreoffice/program/libmergedlo.so(+0x311c8e6)[0x7f4b4adfb8e6]
/usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xe1c36)[0x7f4b40d23c36]
/usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xe3810)[0x7f4b40d25810]
/usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xf015b)[0x7f4b40d3215b]
/usr/lib/libreoffice/program/libmergedlo.so(_Z7InitVCLv+0x4f2)[0x7f4b4ae07be2]
/usr/lib/libreoffice/program/libmergedlo.so(_Z10ImplSVMainv+0x115)[0x7f4b4ae09185]
/usr/lib/libreoffice/program/libmergedlo.so(soffice_main+0xa3)[0x7f4b49ead153]
/usr/lib/libreoffice/program/soffice.bin(+0x10b0)[0x5565c66980b0]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7f4b47a770b3]
/usr/lib/libreoffice/program/soffice.bin(+0x10ee)[0x5565c66980ee]

- or I get:

$ export SAL_USE_VCLPLUGIN= && soffice --draw
terminate called after throwing an instance of 'com::sun::star::uno::RuntimeException'


Fatal exception: Signal 6
Stack:
/usr/lib/libreoffice/program/libuno_sal.so.3(+0x3e843)[0x7f4b47cb6843]
/usr/lib/libreoffice/program/libuno_sal.so.3(+0x3e9ba)[0x7f4b47cb69ba]
/lib/x86_64-linux-gnu/libc.so.6(+0x46210)[0x7f4b47a96210]
/lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7f4b47a9618b]
/lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7f4b47a75859]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0x9e951)[0x7f4b44c42951]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa47c)[0x7f4b44c4e47c]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa4e7)[0x7f4b44c4e4e7]
/usr/lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa799)[0x7f4b44c4e799]
/usr/lib/libreoffice/program/libmergedlo.so(+0xeebe18)[0x7f4b48bcae18]
/usr/lib/libreoffice/program/libmergedlo.so(+0x14edc0d)[0x7f4b491ccc0d]
/usr/lib/libreoffice/program/libmergedlo.so(+0x150b1d2)[0x7f4b491ea1d2]
/usr/lib/libreoffice/program/libmergedlo.so(+0x2cfc5bd)[0x7f4b4a9db5bd]
/usr/lib/libreoffice/program/libmergedlo.so(+0x2cfc89a)[0x7f4b4a9db89a]
/usr/lib/libreoffice/program/libmergedlo.so(_ZN3utl10ConfigItemC2ERKN3rtl8OUStringE14ConfigItemMode+0x82)[0x7f4b4a9d5532]
/usr/lib/libreoffice/program/libmergedlo.so(+0x2d36b16)[0x7f4b4aa15b16]
/usr/lib/libreoffice/program/libmergedlo.so(_ZN19SvtSysLocaleOptionsC1Ev+0x129)[0x7f4b4aa16fb9]
/usr/lib/libreoffice/program/libmergedlo.so(+0x311c8e6)[0x7f4b4adfb8e6]
/usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xe1c36)[0x7f4b40d23c36]
/usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xe3810)[0x7f4b40d25810]
/usr/lib/libreoffice/program/libvclplug_gtk3lo.so(+0xf015b)[0x7f4b40d3215b]
/usr/lib/libreoffice/program/libmergedlo.so(_Z7InitVCLv+0x4f2)[0x7f4b4ae07be2]
/usr/lib/libreoffice/program/libmergedlo.so(_Z10ImplSVMainv+0x115)[0x7f4b4ae09185]
/usr/lib/libreoffice/program/libmergedlo.so(soffice_main+0xa3)[0x7f4b49ead153]
/usr/lib/libreoffice/program/soffice.bin(+0x10b0)[0x5565c66980b0]
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7f4b47a770b3]
/usr/lib/libreoffice/program/soffice.bin(+0x10ee)[0x5565c66980ee]

That's strange, because I installed 7.0 before, and at least the LibreOffice-Launcher and Draw started initially. Then I had a problem with restoring documents from the previous crash and could not start Draw. So I downgraded again. Now I cannot start it anymore at all.

Hope you don't have both LO versions in the same time.

Anyway, I think the best thing to do is:
- remove any LO version
- make sure everything is up-to-date on your system
- install only 7.0.4rc2
- remove LO profile to be sure it's clean
give a new try first in safe mode and if ok, in normal mode

If you still reproduce this the crash at launching, I must recognize I'm stuck.

After resinstalling 7.0.4 I can start the application now.

Also with 7.0.4 the crash does not occur anymore.

For me it's OK to use the newer version from the PPA. Thanks for you help!

Thank you for the feedback.
Let's put this one to WFM then.