Lightroom Classic takes 2:28 to start completely

On the:

• Intel UHD Graphics 770
• NVIDIA GeForce RTX 4070

I think that the Intel is an integrated video control, as opposed to the NVIDIA Dedicated GPU.

If you could reply back what your computer make/model is, and any options when purchased, that may clarify (a link to a web page would help)

If the Intel is just an integrated Video Controller, then LrC can basically ignore it. But some find it best to disable that in the Windows Device Drivers. Their are Adobe Documents on that. Some might even disable that in the BIOS (but can not recommend that as a non tech).

If the Intel is in fact an actual Dedicated (some say Discrete) GPU, with it's own VRAM, And you have that NVIDIA GPU card, then LrC will not like that one bit. (would you get an error???). LrC does not like multiple GPU's (if they are not the exact same make/model). Also, that high end NVIDIA would likely perform better than the Intel.

So, an inquiry, have you disabled the Intel UHD Graphics 770?

• https://helpx.adobe.com/lightroom-classic/kb/lightroom-gpu-faq.html
• https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html
• https://www.techpowerup.com/gpu-specs/uhd-graphics-770.c3844
•  

Suggestion: Reset the Lightroom preferences

    I found two preference files
        Lightroom Classic CC 7 Startup Preferences.agprefs
        Lightroom Classic CC 7 Preferences.agprefs
    I copied each and deleted the originals.
    I restarted LRC and received an error message “An error prevented Lightroom Classic from opening the catalog.”
    I put back the startup preferences file and LRC started, but it still took 2:28
    Surprisingly, the preferences file reappeared with today's date, I guess by LRC, so I decided to reset the preferences using a different method.
        I saved a copy of the preference file
        I started LRC
        I reset the preferences using Shift Alt and clicking
        Apparently, that caused LRC to be restarted, but since I had other apps open, mostly covering LRC, I didn’t realize that immediately.
        So I ended LRC and then started it so I could time it.
        Time was 2:29 so no change.

It may be a typo error, but something sounds wrong in both of those descriptions of how you reset the preferences file.

In the first case, I assume that LrC was not running, correct? Deleting the preferences file (and yes you can delete both of those files) should not cause an error upon starting LrC. Both of those files should get recreated from scratch, and LrC should start.

"an error prevented Lightroom Classic from opening the catalog"

This sounds a lot like "The Lightroom catalog cannot be opened because another application already has it opened.""

• https://helpx.adobe.com/lightroom-classic/kb/lightroom-error-catalog-cannot-be-opened-lrcat-lock.html

A somewhat clumsy video of my accomplishing the above:

• https://www.dropbox.com/scl/fi/idm9o1gideexgltcn2pjy/2024-08-18-19-58-11.mp4?rlkey=p1w7xntueh2i3cqmo1ilgzcd8&st=8nkpnqi3&dl=0

In the second case, I think you skipped over the part where your closed LrC, and then while holding down on Shift and ALT you clicked on the LrC startup Shortcut Icon in the Taskbar. Correct?

And a video of that (shortened a bit)

• https://www.dropbox.com/scl/fi/ugu4c38l33kj3pq4opqcr/2024-08-18-20-04-20.mp4?rlkey=9tj63pvdn4276bi4hjtpnprbh&st=nz8igxhd&dl=0

P.S. the difference in how LrC came back up after deleting the preferences file is due to my (in the first) deleting both files whereas the second method only deleted the one file. You may have noticed an issue in the first one with existing catalog to bring up.

from your LrC /Preferences/Performance, an oddity (Camera RAW 11.5 GB);:

Compared to the GPU VRAM info from your LrC /Help/System Info/:

Dedicated GPU memory used by Lightroom: 582.6MB / 12012.0MB (4%)

and the specifications at NVIDIA for that card, stating 12 GB.

• https://www.nvidia.com/en-us/geforce/graphics-cards/40-series/rtx-4070-family/

So why does the /Preferences/Performance/ show 11.5 GB?

To me, this just makes me think corrupt preferences file.

+1 for the suggestion by @AxelMatt to disable the UHD Graphics.

Adobe applications do not play well with dual GPUs.

Please post your System Information as Lightroom Classic (LrC) reports it. In LrC click on Help, then System Info, then Copy. Paste that information into a reply. Please present all information from first line down to and including Plug-in Info. Info after Plug-in info can be cut out as that is just so much dead space to us non-Techs and it takes up vast amounts of scroll space making the reply less readable and less likely that others will bother with your post.

Also, please post in a reply a screenshot of your LrC /Preferences/Performance/

The first thing that you should try is to switch off the GPU support from the Lightroom preferences and check if that helps to fix the issue.

Go to Lightroom > Preferences > Performance tab > Uncheck "Use Graphics Processor" > Restart Lightroom.

https://helpx.adobe.com/lightroom-classic/kb/troubleshoot-gpu.html

As I see you have buldin a CPU with an internal grpahic processor, try to disabling the processor internal graphic card.Or you're using more than one graphics card in Windows, your high-end card might not be set as the primary card. To disable the lesser of the two cards, use the Device Manager on Windows. In the Device Manager, right-click the card's name and choose Disable.

Another step is to try to reset the Lightroom preferences.

https://www.lightroomqueen.com/how-do-i-reset-lightrooms-preferences/

It's recommended to backup your preferences before you reset the preferences to the default settings:

https://helpx.adobe.com/lightroom-classic/kb/preference-file-and-other-file-locations.html

Is your system up-to-date? Do you have installed all recent updates and patches for the operating system and the device drivers, especially the graphic driver. Please make also sure that you have installed the Studio version and not the Game Ready version of your NVidia driver.