Tab thumbnails disappear randomly

bowelripper

@Pathduck I read that MsMpEng.exe stands for Microsoft Malware Protection Engine. You're probably right, why would it delete an image file, that should be no threat as far as I know.
Also, after applying your new filter MsMpEng.exe disappeared from the list.

I guess I gotta do it the hard way with the standalone solution.

DoctorG

I never hat trouble with Windows 11 Defender deleting thumbs. That would have been detected by me very quick and questioned to dev team.

But @bowelripper should monitor to see which process causes the deletion.

Pathduck

Important to note as well: Vivaldi seems to do regular "cleanup" operations on that folder, so seeing Delete operations would not be out of the ordinary.

To make sure you only catch delete operations on the actual tab thumbnails you have open - you can find out what image is used by a tab by opening it. For instance if I have Accuweather open in a test profile, and the file CN7OBFAWD3PBEST53FDRMTIHHIV6BY3U.jpg looks like this:

So that file is the thumb for Accuweather.
You can monitor for that specific file by setting Path = <full path to file> in ProcMon instead of the folder. You can add several of these filters.

I tried reproducing your issue, with ProcMon running.

Open clean profile
Enable side tabs like you have
Enable tab thumbnails
Open a bunch of tabs from the Start Page
Look in VivaldiThumbnails that thumbs are created
Restarting the browser several times and seeing if any files are deleted
No files were deleted

However:

Changing Startup With to Start Page, files were deleted - as expected as no tabs were open and so thumbs are no longer referenced and needed.

DoctorG

@Pathduck Oh, yes, Startup With setting let Vivaldi clear thumbs at start.

Never saw this as my Vivaldi browsers allways start with Last Session.

bowelripper

@DoctorG & @Pathduck Startup With is set to Last Session and has always been (I've never changed it).

@Pathduck As I described in this post, I observed that all the files were deleted when closing Vivaldi. It does so at random times, is what it looks like. Edit: So when the tab images were gone today, they probably got deleted when I closed Vivaldi yesterday before shutting down the computer.

DoctorG

@bowelripper

Can you open internal Vivaldi page chrome://settings/system , switch off "Continue Running Background Apps" , restart Vivaldi and check if error goes away?
Do you use Windows Quickstart?
Do you have made optimisation settings in Windows Registry to shutdown faster, forcing closing of apps?

bowelripper

Okay, I've turned off "Continue running background apps"
No, I don't use Win quickstart
Nope, never been in the registry to optimise that

Anyway, when I observed it happening (like I said in an earlier post), it was not before shut-down. I just closed/opened Vivaldi many times to try to recreate the problem.

bowelripper

So, it happened again when I closed Vivaldi just now - all image files deleted. And Process Monitor caught it. As we can see, Vivaldi.exe is behind it. Now what remains is to find out why.

bowelripper

It has happened again

smrt28

Hi, there is a garbage collector that deletes all the thumbnails without a reference. So, it correctly deletes the files, the problem is it deletes more files than it should. If something is broken, it is probably this garbage-collector.

When you run vivaldi --v=1, you should see the messages like "VivaldiImageStore GC started" and "10 unreferenced image files were removed".

As this hasn't been broken quite a while, I have to remember how it all actually works .

bowelripper

@smrt28 Hello, thanks for the reply. I can't see any of those messages when using --v=1.

No one else here is using tabs with images, or? Since no one else has reported here with the same problem.

smrt28

@bowelripper hmm, those log messages are probably not in the release builds.

In the default settings you should see the thumbnails when you hover the mouse over the tabs. If the thumbnail is missing, you would see just the title. So yah, nobody may have noticed.

Anyway, good news, it seems I can reproduce it

DoctorG

@smrt28 said in What's up with this? (Tab images gone):

Anyway, good news, it seems I can reproduce it

Good! The bug was so weird for some users.

bowelripper

Hope there's gonna be a solution, it's kind of annoying

DoctorG

@bowelripper You can read changelog of latest Snapshots releases for a upcoming 7.2 Stable, where the bug, i am hopefull, will be fixed.

smrt28

@bowelripper FYI, I just pushed the fix. I'm not sure if it will make it into the release, but it should be present in the Sopranos build. Since I'm not certain that the bug I reproduced was actually your bug, please let me know if the thumbnails still disappearing.

bowelripper

@smrt28 According to the changelog, it does not seem to have made it into the release (I'll let you know when/if it happens). How can I get the Sopranos build?

bowelripper

Happened again just now, so not fixed in 7.2.

mib2berlin

@bowelripper
Hi, I guess this will happen in a minor update of 7.2, some other bugs popup but they are fixed internally already.
Sopranos are internal testers, mostly long term Vivaldi/forum users with technical background.
They get the soprano builds to test before changes are published in the snapshot (Beta) then stable.
The Vivaldi team ask for new Sopranos if they need testers here in the forum.
If you want to test the snapshot builds use the Standalone install.

Cheers, mib

bowelripper

I'm on the latest snapshot and the problem is still there.