Kill Vivaldi GPU To Launch V

[LaughingCoyote]

I have the same problem. I get this when I try to run vivaldi with disable gpu
[slmikesell@192 ~]$ vivaldi --disable-gpu
[8908:8908:1227/090001.183340:ERROR:process_singleton_posix.cc(353)] The profile appears to be in use by another Vivaldi process (36973) on another computer (fedora). Vivaldi has locked the profile so that it doesn't get corrupted. If you are sure no other processes are using this profile, you can unlock the profile and relaunch Vivaldi.
[8908:8908:1227/090001.183397:ERROR:message_box_dialog.cc(146)] Unable to show a dialog outside the UI thread message loop: Vivaldi - The profile appears to be in use by another Vivaldi process (36973) on another computer (fedora). Vivaldi has locked the profile so that it doesn't get corrupted. If you are sure no other processes are using this profile, you can unlock the profile and relaunch Vivaldi.

[mib2berlin]

@LaughingCoyote
Hi, I think this is a different problem.
Did you check if a Vivaldi process is still running?
If yes, kill it or simply reboot.

[LaughingCoyote]

It doesn't show up in the gnome-system-monitor

Furthermore I can't seem to find the Vivaldi profile folder in either the vivaldi folder or the vivaldi snapshot folder.

[LaughingCoyote]

@LaughingCoyote furthermore I rebooted the computer and the same message comes when I try to start vivaldi.

[mib2berlin]

@LaughingCoyote
Hm, the profile folder called "Default" is in /home/user/.config.
These folders are often hidden by default, Ctrl+H should make them visible in your file manager.
Vivaldi create folders in /tmp
after closing they should be removed.

[LaughingCoyote]

Yes, thank you, I found them all in Default folder in both the Vivaldi and Vivaldi-Shapshot folders. At least I was able to back up everything. The tmp had nothing related to vivaldi in it. In previous instances I have been able to get Vivaldi working again by removing the snapshot folder and then sync everything from the cloud. But this time it had no effect. I saw a "lock" file in the config/vivaldi folder, but that had nothing written in it and removing it didn't make any difference anyway. I guess I could reinstall Vivaldi, again, although this is starting to get a bit monotonous. Two other computers back home in the US -- I'm in Nepal now -- use AntiX (a Debian build) rather than Fedora, and I have never had such problem. The problems have both times started after installing a new snapshot.

[mib2berlin]

@LaughingCoyote
I am sorry but I have no further ideas, sometimes I get issues with messed up GPU acceleration and have to start with --disable-gpu but this was after an update of Opensuse not Vivaldi.
We have some Fedora user here but I am nit aware of other reports lately in the forum.

Cheers, mib

[Roesten]

@LaughingCoyote
I have been getting the same errors: 1) "The profile appears to be in use by another Vivaldi process. Vivaldi has locked the profile..." 2)" Unable to show a dialog outside the UI thread message loop: Vivaldi - The profile appears to be in use by another Vivaldi process. Vivaldi has locked the profile. If you are sure no other processes are using this profile, you can unlock the profile and relaunch Vivaldi." message.
This would happen after a major system update requiring a reboot and leaving the Vivaldi browser open at shutdown.
At one time, at reboot, you would get only the first error and a GUI would pop up allowing you to kill the old process/profile but with the latest updates you get the second error which is a bit of a catch 22. The browser gets locked, then the gui that is meant to unlock it fails.
I have fixed it by deleting the profile folder called "Default" in /home/user/.cache/vivaldi/
Your distribution file structure may be different but look in .cache instead of .config.
This solution may not help you but could perhaps help others.

[DoctorG]

Locked profile can be caused by lock file; please run after Vivaldi exited this in shell:
rm .config/vivaldi/SingletonLock*

[LaughingCoyote]

@mib2berlin
I did remove the Default folder. At first it had no effect. But then when I opened again it did open without problem (as demonstrated by fact that I am posting this in Vivaldi). I now also unclicked the Webpage acceleration in the settings, just to be on the same side.

[LaughingCoyote]

@DoctorG Thanks. I'll keep that in mind for next time which I hope doesn't happen, since removing the default folder worked this time.

[summoner]

@DoctorG

Thank you. Working on Arch Linux.

[gspot]

@DoctorG Thanks! This solution worked for me to recover my profile after installing a new linux distro.