Bug 433503

Summary: Falkon hangs and takes stops the OS from working
Product: [Applications] Falkon Reporter: Nicholas <nicholas>
Component: generalAssignee: David Rosca <nowrep>
Status: RESOLVED WORKSFORME    
Severity: normal CC: jurajoravec
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Other   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Nicholas 2021-02-23 18:14:38 UTC 
SUMMARY
Browser hangs,renders the whole system unresponsive

STEPS TO REPRODUCE
1. Goto https://coronavirus.data.gov.uk/details/interactive-map
2. Goto https://coronavirus.data.gov.uk/details/interactive-map in a new tab
3. Goto https://coronavirus.data.gov.uk/details/interactive-map in a new tab
4. Drag the map around
5. Put the browser under more load

OBSERVED RESULT
The whole OS stops working, can't use Ctrl+Alt+F3 to get to a TTY


EXPECTED RESULT
Either work and not break or provide a message saying the page is unresponsive, don't crash the whole system

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 20.10
(available in About System)
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.74.0
Qt Version: 5.14.2

ADDITIONAL INFORMATION
This is on a new laptop Dell i7-1165G7 - This laptop model number is certified by Cannonical
The laptop has around 16gb of memory
It is running a resonably vanilla fresh install of Kubuntu
If Falkon can't run, then it shouldn't take down my whole OS, so there may be 2 issues, one: Falkon has some issue with memory, second: nothing catches the situation
Comment 1 Juraj 2021-03-08 20:17:43 UTC 
It never happened to me that Falkon caused any issues apart from eating memory and CPU resources.

Crashing the whole system can have many other causes.

I do not own your laptop, can you provide logs?
I am using adblock with many filters could it be related to some trackers, miners or ads hidden on that website?
Comment 2 Nicholas 2021-03-12 15:09:13 UTC 
@Juraj thanks for your reply, I appreciate that you don't have my laptop, what logs would be most helpful?
Comment 3 Juraj 2021-03-12 17:29:27 UTC 
logs, well try to launch Falkon from terminal to get logs from it.
If anything else crashes (like X)  maybe also that.
I cannot promise I will be able to find a cause.
I would be wise to check the state of you memory and cpu utilization at the moment of an error.

This behaviou looks to me like the whole Io was taken by falkon/qtwebengine, or that you ran out of memory.
Comment 4 Bug Janitor Service 2021-03-27 04:33:36 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 5 Bug Janitor Service 2021-04-11 04:33:27 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!