Sonoma - login resolution problem

hi tbirdvet

I completely uninstalled the calibration app, but nothing changed

I did also the test that Luis Sequeira1 recommended (start in SafeMode): the login mask appears correct, but

the resolutions recognized in 'safe mode' are different from those in 'normal mode' (I have attached the two screen shots)

I also tested Thunderbolt cable and monitor with another Mac and there is no problem.

Honestly I also tried to do an installation on a clean external hd and nothing changes !

I really don't understand, it's ok I'll keep the resolution set to 2880 x 1620, but I would like to know what do you think might be causing this and if there is a possible solution (e.g. can i somehow reload the 'drivers/parameters' of my monitor ?)

thanks

start in Safe Mode - resolution

Normal Mode - resolution

Hi tbirdvet,

none antivirus, I have only SpderXLite (software for monitor calibration), but I think that Mac load it after login

if it would be helpful, for advice on what to do:

1. if another resolution (lower or higher than the default e.g.: 2048 x 1152) does not present any problem

2. as soon as I upgraded to Sonoma everything worked normally then I started with this strange problem

thanks

Hi at all

none antivirus, I have only SpderXLite (software for monitor calibration), but I think that Mac load it after login

if it would be helpful, for advice on what to do:

1. if another resolution (lower or higher than the default e.g.: 2048 x 1152) does not present any problem

2.I've tried booting in safe mode and the Mac sets default to 2048 x 1152 resolution, even though I put a different resolution

3. as soon as I upgraded to Sonoma everything worked normally then I started with this strange problem

is there any way in your opinion to reload the monitor drivers or do some kind of reset, without having to do a reinstall OS by zero ?

thanks you for any suggestions you may give me

Luis Sequeira1

sorry, I'm trying to do various checks to understand the problem

if when the login screen I was talking about at the beginning appears, I unplug and reconnect the Thunderbolt cable, the regular screen magically appears on the entire screen.

What I don't understand is how a reinstallation of Sonoma doesn't fix the problem

Yes, ku4hx, absolutely

the only problem is the login mask

that remains in a rectangle at the bottom left of the screen,

only at a certain resolution (the default one)

Then if at that time I take off and put back the thunderbolt cable magically the login mask goes back to full screen

It's more the problem of understanding why

Unfortunately not, I only increased the resolution to high resolution (2048 x 1152) and magically the login wallpaper is displayed correctly.

I was hoping the latest Sonoma updates would fix this bug ....

Hi Luis Sequeira1

yes it's correct, the problem appears only at login mask (after the login Sonoma works correctly) and only in normal mode

I've attached the report (splitted into 2 parts)

Thank you

I make some space

But it is not clear to me how this affects in practice with the login problem.

I was thinking about some driver/setting related to my monitor: what do you think about ?

Thanks