sleep mode

Why do I lose my external hard drive when my Mac Mini goes to sleep?

Episode 1490

Mars Worm from The Chatroom
Mac Mini

Mars Worm in the chatroom is having issues with his hard drive unmounting in his Mac Mini when it goes to sleep. Leo says that computers going to sleep has always been a pain, going back to the early days. Hibernation is even worse.

There is a tech note from Apple about that here, at support.apple.com. It's also talked about at blog.grapii.com.

What does the long beep mean when I try to boot up my iMac?

Episode 1474

Bob from Alpine, CA
Apple iMac

Bob put his iMac to sleep and then when he went to wake it up, he got a "bong" with a blank screen. Leo says that those tones indicates different things depending on the tone. Here's a list. It's possible the backup battery in the computer is dead and needs to be replaced. But it could also be a failed hard drive. It could also be an EFI ROM update is in progress. If you hold down the D key when booting up, you'll go into diagnostic mode. If that doesn't work, then you have a major hardware failure.

Why does my laptop display have problems after waking up?

Episode 1446

Andrew from California
BIOS

Andrew's laptop goes to sleep and when he wakes it up, it shows a broken up video screen until he reboots. Leo says it wakes up confused, and he's not surprised since it's Windows. But he's never seen what Andrew describes. It usually causes problems like this with Hibernation, but not sleep. That's why he recommends disabling hibernate. But sleep shouldn't do that since the RAM gets refreshed regularly. If his BIOS is out of date, that could cause it. But it's never happened to Leo. Andrew should also make sure his display drivers are up to date.

Why does my PC go to sleep after a minute?

Episode 1430

Aaron from Massachusetts
Windows 10

Aaron wants to know about Windows' Advanced Settings that he can access via Windows Key + X. He's noticed it gives access to Control Panel and Leo says it has several settings to add and take away different features. But Aaron says the recent Windows 10 Creator's Update now puts his PC to sleep after a minute or two. How can find it in the new Control Panel? Leo says to look under the Power and Sleep settings. He went there and set it to 2 hours, but it still goes to sleep after a minute.

How can I protect my Mac?

Episode 1357

John from Los Angeles, CA
Apple MacBook Pro

John wants to know if keeping his Mac on while he's walking around will damage the laptop. Leo says not if he puts it to sleep. It stops reading the drive that way.

What is a hardware password? A hardware or firmware password will keep the computer from starting up in any way other than its designated startup. On the Mac, he'd go into Utilities and set his firmware password. It's very important not to forget it, though.

Why does my computer refuse to log in after it goes into sleep mode?

David from Los Angeles, CA

Episode 1277

David has a problem where his computer shuts off after awhile and he has to log in twice to get it back. Leo says he's had a similar issue with a MacBook. As long as he uses it every day, it's not problem. But after a few days, this issue would pop up. Leo just logs out and shuts down and that solves the issue. David should uncheck put the hard disk to sleep. He should also disable Power Nap. Those things may prevent this from happening. Turning off the Sleep function entirely will work as well, but he'll be using power then.

Why is my computer not seeing my USB 3.0 hard drive after waking from sleep?

Episode 1132

Mark from Chatsworth, CA
USB hard drive

Mark bought a Dell Desktop with Windows 8 and downgraded to Windows 7. But his USB 3 hard drive isn't working right when waking from sleep, even after he's re-installed the drivers. He has to reboot the computer to get it to read the hard drive.

Leo says to check out the USB Root Hub. He should make sure that the checkbox "wake from sleep" is enabled (checked). Otherwise it won't wake up.

Should I leave my computer on all day?

Episode 1114

Dan from Tehachapi, CA
Power

Dan is on his computer for about an hour and a half in the morning, then another hour and a half in the evening. Dan is wondering if he should shut down his computer during the day, or leave it on and have it go into sleep mode. Leo says that modern computers handle power pretty well. He can choose in his power saving control panel a variety of different schemes, but the default should be fine. It will go into a low power mode that only uses a few watts, even less than what a light bulb would use. During the day, if he's going to use it off and on, that's what he should do.

Why does my computer freeze when waking up from sleep mode?

Michael from Garden Grove, CA

Episode 1072

Mike's computer freezes up when it's coming out of sleep mode. Leo says that it's a common problem with computers, especially Macs. But even Windows machines have this happen. It's like the computer is "groggy." Sleep puts the computer into a low power mode but still feeds power to the RAM to prevent the user from losing information. It can be problematic, though. Hybernation has it's own similar issues. Leo suspects that since the mouse and keyboard work, that the computer hasn't really crashed. He should do a Google search for the specific computer model.