Updated to LR Classic v15.0 and program is now extremely slow.

[Rlrood]

After installing LR Classic the app is now so slow that it is unusable. Windows 11, strong PC.

[Rikk Flohr: Photography]

@Rafael Aviles 

Your symptoms could be the result of a bad install.  I don't see here where you've done a clean reinstall. I would recommend doing so. 

Clean Lightroom Install Procedure

• Close Lightroom
• Restart the computer
• Use the Adobe Creative Cloud App to uninstall Lightroom
• Restart the computer
• Install Lightroom via the Creative Cloud App without launching any other programs.
• Restart the computer
• Launch Lightroom
• Wait 5 minutes

[Rlrood]

Thanks Rick. Did exactly that and no improvement. Thinking about going back to 14. something like that, the last version that ran well.

[Rikk Flohr: Photography]

I am running multiple machines (9) Mac and Windows with no issues so I suspect there is something amiss on your machine. 

The next step, even if you've already done so, is to reset Lightroom Preferences using this method. 

This procedure works for both Lightroom Classic and Lightroom Desktop.

If you are using Lightroom Desktop, it can change your local storage location. Please review this setting after resetting preferences. 

Reset Procedure:

1. Close Lightroom.

2. Hold down [Alt/Opt]+[Shift] while restarting Lightroom.

3. Overwrite the Preferences when prompted by the dialog.

4. Close Lightroom.

5. Restart Lightroom.

[Rlrood]

I suppose this question will come across as a bit uninformed (stupid), but will your procedure leave me with a completsely blank set of preferences, or what?

[Rikk Flohr: Photography]

It restores your Preferences to the Default state (fresh install). Your preference file survives intact via an uninstall/reinstall so it is necessary to reset it separately.

[Rafael Aviles]

Thanks, Rick. I was following your procedure but when I got to the third step, I noticed that the Uninstall option was grayed out. Then i discovered that the Creative Cloud App was in the process of uptading LRC to version 15.0.1 on its own. I let it complete the update and after several minutes, I launched the new version and...the problem came back after I edited a photo. Argh! 

I should say that I have reset my Preferences several times before while I was trying to fix the problem, as it is something that several people recommended.

I am not sure what to do next!

[Rikk Flohr: Photography]

The auto-install probably soiled things.  I recommend turning it off temporarily. 

Disable Auto install in the CCD App

Perform again the Clean Install
Perform again the Preference Reset.

The order is important. 

[Rafael Aviles]

Rikk, I am sorry to report that even after disabling auto install in the Creative Cloud App, performing again the Clean Install, and Resetting the Preferences, in precisely the order you posted, the problem persists. When I launched LRC it seemed to be OK but after I edited a photo (in LRC and PS) and came back to LRC,  the program is barely responding again (severe lag even when scrolling in Library module or selecting a different photo). I would clarify that it is not necessary to edit in PS and return to LRC for the problem to reoccur, simply editing in LRC does it.

Now I'm back to where I started but my preferences are in their default state. Argh!

[Rikk Flohr: Photography]

That is good information - thank you for taking the trouble to perform the reinstall. 

Next stop: Mac User Account.

In your macOS, you will need (for test purposes only) to create a new user account with Admin permissions.  Restart your computer, then log in to the test user account.  Launch Lightroom and attempt to use it. Is there any difference?

[Rafael Aviles]

Sorry, Rikk, but that did not work either. The behavior is the same as with the other account (extreme lag, unresponsive, etc,). I know it was worth a try, and I appreciate your help, but reading through this discussion (and similar ones in this Forum) I see that Windows users are affected as well, so it probably is not a Mac User Account issue.

[Rikk Flohr: Photography]

Well, that is the easy/common stuff and it is good to eliminate those items as potential issues. 

Beyond checking your Hard drive's free space is at least 20%, and turning off your Anti-virus (if any), I don't have another obvious suggestion.

At this point, I recommend contacting support and having them review your system. 

Your issue can best be resolved by contacting Adobe Customer Care at https://helpx.adobe.com/contact/what-contact-options.html.  Scroll to the bottom and click on the “Start Now” live chat link in the lower right of this page. Typing “Agent” into the chat text field will bypass the initial chatbot.

[Rafael Aviles]

Rikk, I may have spoken too soon. I think LRC was initially very slow on the new account because it was trying to locate all the files in the catalog, many of which are on external drives that the new account did not have access to. After some time, and having located many (but not all) the files, LRC seems to run at normal speed. 

So, if it was actually a Mac User Account issue, what is the fix?

[Rikk Flohr: Photography]

Let's run it for a day or two to confirm, but unraveling Mac User Account issues is a little outside my area of expertise.  On my Windows and Mac systems, I maintain a separate Admin login for just such occurrences.  When this happens, I don't normally waste time trying to figure out what is wrong and just start using the new account. 

Others more OS-versed may be able to give you alternate advice.

Fingers crossed!

[Rafael Aviles]

Rikk, unfortunately that is not going to work for me. I looked into what it would take for the new account to have essentially the same file and drive access, preferences, priviledges, etc., so as to be essentially a clone of the other one and it is quite complicated and would require way too much time and work to set up as such. I am sure I would end up with more problems than I have now.

I will contact customer care but I am not looking forward to spending lots of time explaining what the problem is and going through the same attempts at fixing it that I have already tried.

I will just limp along with the program as it is (I just need to restart it frequently) and hope that a new update will fix the problem.

Again, thank you very much for all your help, I do appreciate it.

[Rikk Flohr: Photography]

As someone who set up a brand new Mac from scratch this morning to replace my primary machine, I understand the pain. Unfortunately, I think the ultimate solution will be to use the new Mac User Account. Support may have a better answer, or, as I said, someone with more macOS experience. 

[Ivan CS Kuznetsoff]

This helped me. Go to nvidia control panel, find Lightroom in program settings. Set monitor technology to fixed refresh and Power management mode to "Prefer maximum Performance".