Having installed IDLE on Chromebbok/Linux Bullseye, on startup the UI crashes as soon as a menu item is selected.  Also when trying to use Thonny. Other packages seem OK.

Used to work fine under Buster, but not since fresh install to Bullseye.

Apologies from my knowledge/skill level.

This issue tracker is for improving the CPython distribution.  It is not a tracker for other software, or for general help with running Python.  For the latter, try
https://mail.python.org/mailman/listinfo/python-list

Thonny is 3rd party software with its own tracker, although I suspect that the problem is with your upgrade Chromebook/Linux Bullseye.  While running Python on Linux on PCs is supported, I do not believe Chromebooks are included; there is certainly no Chromebook buildbot for testing CPython listed on https://buildbot.python.org/all/#/builders.  If there is a Chromebook Python list, you might ask if tkinter works with Bullseye for other users.

IDLE *is* part of CPython.  What specific release of Python are you running.  This is the first thing IDLE prints when it starts.

If you are running a somewhat recent release of 3.9 or 3.10, then continue.  To see whether there might be an IDLE-specific or ever tkinter-specific problem, run the CPython test suite from a command line with "python3 -m test -j0 -ugui" and report results.  (Or 'python ...' is 'python' works to run python 3.) If it passes except for IDLE tests, start IDLE from a command line with "python3 -m idlelib".  Get IDLE to quit/crash.  Then report any error info printed in the terminal.

Thank you Terry for your interest/helpfulness.  I'm a bit out of my depth
but to explain,  I first noticed the problem attempting to run Thonny as an
development tool for Raspberry Pi RP2040 Picos.
Previously it all worked great running on Buster.  When I hit problems
after moving to Bullseye I raised a bug with thonny.org and exchanged
several posts with https://github.com/aivarannamaa who was very helpful and
he observed the Thonny GUI uses the same as IDLE - so I tried it and found
the same.  Aivar couldn't replicate the issue but after several attempts
suggested:
https://github.com/thonny/thonny/issues/2196#issuecomment-1069473517.

You will see from our exchanges that I found the 'core' of Thonny (and IDLE
if the window doesn't collapse immediately) seems to be running OK (e.g.
>>> 22/7 > 3.142... etc) but any menu operations crashes it immediately.
This obviously leaves a mess and neither IDLE nor Thonny will reload
without restarting the whole linux container.  Anyway, running the tests
you suggested gives the following.  Thanks again and let me know if I can
help further.

—------------------

python3 -m test -j0 -ugui

== CPython 3.9.2 (default, Feb 28 2021, 17:03:44) [GCC 10.2.1 20210110]

== Linux-5.10.106-15260-g6010c49177e8-x86_64-with-glibc2.31 little-endian

== cwd: /tmp/test_python_19389æ

== CPU count: 2

== encodings: locale=UTF-8, FS=utf-8

0:00:00 load avg: 0.00 Run tests in parallel using 4 child processes

0:00:00 load avg: 0.00 [ 1/10/1] test_builtin failed

test test_builtin crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_builtin'

0:00:00 load avg: 0.00 [ 2/10/2] test_dict failed

test test_dict crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_dict'

0:00:00 load avg: 0.00 [ 3/10/3] test_opcodes failed

test test_opcodes crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_opcodes'

0:00:00 load avg: 0.00 [ 4/10/4] test_grammar failed

test test_grammar crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_grammar'

0:00:00 load avg: 0.00 [ 5/10/5] test_exceptions failed

test test_exceptions crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_exceptions'

0:00:00 load avg: 0.00 [ 6/10/6] test_types failed

test test_types crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_types'

0:00:00 load avg: 0.00 [ 7/10/7] test_doctest failed

test test_doctest crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_doctest'

0:00:01 load avg: 0.00 [ 8/10/8] test_unittest failed

test test_unittest crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_unittest'

0:00:01 load avg: 0.00 [ 9/10/9] test_doctest2 failed

test test_doctest2 crashed -- Traceback (most recent call last):

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 270, in
_runtest_inner

    refleak = _runtest_inner2(ns, test_name)

  File "/usr/lib/python3.9/test/libregrtest/runtest.py", line 221, in
_runtest_inner2

    the_module = importlib.import_module(abstest)

  File "/usr/lib/python3.9/importlib/__init__.py", line 127, in
import_module

    return _bootstrap._gcd_import(name[level:], package, level)

  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import

  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load

  File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked

ModuleNotFoundError: No module named 'test.test_doctest2'

0:00:03 load avg: 0.24 [10/10/9] test_support passed

== Tests result: FAILURE ==

1 test OK.

9 tests failed:

    test_builtin test_dict test_doctest test_doctest2 test_exceptions

    test_grammar test_opcodes test_types test_unittest

Total duration: 3.8 sec

Tests result: FAILURE

—-----------------------------

[comment: despite failure I tried this, leading to …. > a window flashes on
the screen and vanishes]

On Wed, Apr 6, 2022 at 2:27 AM Terry J. Reedy <report@bugs.python.org>
wrote:

>
> Terry J. Reedy <tjreedy@udel.edu> added the comment:
>
> This issue tracker is for improving the CPython distribution.  It is not a
> tracker for other software, or for general help with running Python.  For
> the latter, try
> https://mail.python.org/mailman/listinfo/python-list
>
> Thonny is 3rd party software with its own tracker, although I suspect that
> the problem is with your upgrade Chromebook/Linux Bullseye.  While running
> Python on Linux on PCs is supported, I do not believe Chromebooks are
> included; there is certainly no Chromebook buildbot for testing CPython
> listed on https://buildbot.python.org/all/#/builders.  If there is a
> Chromebook Python list, you might ask if tkinter works with Bullseye for
> other users.
>
> IDLE *is* part of CPython.  What specific release of Python are you
> running.  This is the first thing IDLE prints when it starts.
>
> If you are running a somewhat recent release of 3.9 or 3.10, then
> continue.  To see whether there might be an IDLE-specific or ever
> tkinter-specific problem, run the CPython test suite from a command line
> with "python3 -m test -j0 -ugui" and report results.  (Or 'python ...' is
> 'python' works to run python 3.) If it passes except for IDLE tests, start
> IDLE from a command line with "python3 -m idlelib".  Get IDLE to
> quit/crash.  Then report any error info printed in the terminal.
>
> ----------
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue47229>
> _______________________________________
>

"Thonny GUI uses the same as IDLE": I presume this means that Thonny also uses tkinter and both fail, which means that tkinter is not working right.   Your test run indicates that python is not running correctly either.  It only tried to run 10 of what should be over 400 tests and 9 of those failed because of failure to import the test file.  You should report this to whoever supplies python on Chromebook, which I presume is whoever supplies Bullseye.

'cc' Terry to say thank you.

Just fyi I regressed my Chromebook to Debian/Buster form Bullseye, as IDLE
and Thonny had previously worked seamlessly but now it doesn't work on
Bullseye either  -> so Google must have broken something along the way
upgrading ChromeOS [98..101].

I have reported this via Google's bug reporter.  Fingers crossed and thanks
for your help :-)

On Thu, Apr 7, 2022 at 6:28 AM Terry J. Reedy <report@bugs.python.org>
wrote:

>
> Terry J. Reedy <tjreedy@udel.edu> added the comment:
>
> "Thonny GUI uses the same as IDLE": I presume this means that Thonny also
> uses tkinter and both fail, which means that tkinter is not working right.
>  Your test run indicates that python is not running correctly either.  It
> only tried to run 10 of what should be over 400 tests and 9 of those failed
> because of failure to import the test file.  You should report this to
> whoever supplies python on Chromebook, which I presume is whoever supplies
> Bullseye.
>
> ----------
> resolution:  -> third party
> stage:  -> resolved
> status: open -> closed
> title: IDLE / Thonny UI crashes on Chromebook Linux/Bullseye -> IDLE  UI
> crashes on Chromebook Linux/Bullseye
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue47229>
> _______________________________________
>