Q: Resolution Lowered When Waking Up in 10.8.3?

Nope, Resetting NVRAM doesn't help! And this is still not fixed with 10.8.4.

I don't quite know how to 'find a resolution setting that is compatible with both your monitor, and the generic VGA monitor settings for the Mac', could you please be more specific? Thanks a lot!

Keewawa-

The next time the problem happens, go into System Preferences, then go into Displays, then change "Resolution" form "Best For Display" to "Scaled." Then chose the appropriate resoultion setting. Make sure it's one that works when the computer is correctly recognizing your Moinitor too. Then, put the Mac to sleep manually, and wake it up, and if the Mac recoginizes your Monitor, then change the resolution settings there to match the Generic VGA settings that you set when your Mac was not recognizing the particular VGA Monitor.

In my case, 1920x1080 at 60hz worked for both my monitor and the generic VGA monitor settings.

Ok, Will try! Thanks!

Just cannot understand why Apple doesn't try to fix this problem, so annoying!

Because Apple doesn't care about people like us who use non-Apple VGA monitors, they want you to buy a brand new MacBook Pro with Retina Display for $1500-$3000 and then shell out another thousand dollars to buy an Apple Thunderbolt display.... I live in reality where i have a four year old MacBook Pro 13" that I cannot afford to replace right now, and a $125 HANNspree monitor that I bought at Staples. While Apple does supply adaptors for non-Apple monitors so that they can compete with other brands who let you use any monitor, truthfully, they want you to buy their monitors. I don't have a grand for a monitor. Not when a descent one is under $200 at Staples or Best Buy! I love my Mac, and all my other Apple products, but Apple does not cater to budget-conscious people.

But that's just ridiculous since it's not everyone can spend nearly $1000 only just for a monitor. But anyway I actually have also started considering to downgrade the system (it's 09 Mac mini) to Snow Leopard to get rid of this problem. Thanks again.

I agree, but Apple has the philospophy that "we make the best product, so people should be willing to pay more to have our product." While they are right, it's not fair to the average person who can't afford some of their stuff, and it prevents them from being the frontrunner in the personal computer world. I was royally ****** when Apple discontinued the "regular" MacBook, and now the new lineup is very expensive if you want the latest technology. But, I love Macs, so I'm a sucker. Mercedes is one of the best cars made and has the latest technology, but even Mercedes makes affordable models.... they should have at least one fully-functional 13" Mac Laptop for $800 or less.... the $999 MacBook Air 11" is a joke, nobody can do any real work on that thing, it has an iPad-sized screen and a tiny hard drive. I'd love to get a new MacBook Pro, but I can't afford the Retina model and even the regular MacBook Pro is expensive enough, and yet no longer cutting-edge, compared to the Retina model that will invetibley replace it. Rumor has it that iOS (iPad operating system) Macs with ARM processors will replace all OS X Intel Macs eventually anyway, but Apple denies that. I hope that that does not happen.

As you can see, I'm both an Apple fan and an Apple critic. They make the best products in their class (Mac, iPhone, iPad, iPod), but they're overpriced and a control freak of a company.

Do NOT downgrade to Snow Leopard. Snow Leopard is too outdated at this point, in fact, they are going to be replacing Mountain Lion with Mac OS X 10.9 somewhat soon, I hear, and Mountain Lion, overall, is the best version of OS X yet, in many ways, despite this problem. I highly recommend sticking with Mountain Lion.

Did you have any sucess doing what I said with adjusting the settings? It made the problem bearable for me.

Thanks.

this problem occured exactly the day that I upgraded to 10.8.3.

So if you can downgrade to 10.8.2 maybe it works. I have given up hope in getting a solution from Apple.

My quickfix:

I go to the loginscreen and if the display settings are all wrong I choose "cancel" or "sleep". Then I wake the screen right after my disply shows the "no input, monitor going to sleep". Some times it takes 2 tries but most times it comes back with full resolution after 1 try.

Martin-

Other versions of your quickfix that I was doing was jut putting the Mac back to sleep manually and then waking it up again, opening the laptop and closing it again, or unplugging the monitor from the mac and plugging it back in again. However, having to do any of these was irritating me, so chosing a mutually compatible resolution setting for my monitor and for generic VGA monitor is the "workaround" that worked best for me.

I also did not have the problem until upgrading to 10.8.3, but downgrading is not my thing..... maybe things will be better with OS X 10.9 Mavericks.... or maybe I won't bother getting Mavericks until I get a new Mac, I haven't decided. 

Here's what I think is the issue (at least for my Mac Mini)... the monitor itself is going to sleep before the Mac is going to sleep. I just changed the ECO settings for my monitor to go to sleep AFTER my computer does. The reasoning is that the computer will go to sleep "remembering" my monitor & therefore wake up with that same CORRECT resolution. Otherwise, if the monitor was already asleep prior to the computer going to sleep the computer would only remembers some blank, sleeping monitor (who knows what the computer sees when your monitor is sleeping?). I'm trying it out with high hopes it will fix this issue.

I started having the same problem when I changed the default timer for computer sleep (I set it to 1 hour).

Then I tried to restore the default values and the problem is gone!

Try to restore default values in ECO and hopefully you solve the problem too.

Of course it would be nice to have a real solution to the problem that allows to set any values in ECO, but for the moment I'm happy with this "solution".

I have the same issue since the upgrade , my Mac Mini is connected to my tv screen as far as I know apple doesn't sell tv yet .... It's a very annoying bug introduced by the maverick upgrade very disappointing