Screen is dim after reboot

I'm hoping someone can assist. I'm not the best at the Mac OS, but I'm having an issue where I had to reboot my Macbook Pro (2011). When it restarted, the screen is really dim and when I try to log in, I get some status bar at the bottom that only goes about 25% of the way, then the screen goes completely black. I have no idea what to do.

has found a workaround. Thank you, aplgc."Futher testing has given me a reasonable work-around until a new display driver can be distributed. I have changed the the keyboard sleep button action to HIBERNATE. {control panel} {power options} {edit plan settings} {change advanced power settings} under {power buttons and lid}- select Sleep button action & set to Hibernate. I have also set the auto sleep timer to a longer time {1hour). So now when I use the keyboard sleep key, the computer hibernates instead of sleep. This requires a power button press to resume, but the screen brightness is normal and all is well. If an auto sleep has occured and the screen is dim--a hibernate cycle will restore brightness without rebooting. Hope this works for others".Source

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How to get the screen to dim after a certain time?

cant remember how to get screen to dim after no screen activity? anyone remember?

Settings, general, autolock. Set it for however long you want it.

Screen is dim after software update

For the last day and a half, my MacBook screen won't go to full brightness. I have the power connected and I've rebooted and I'm using the screen, but it's still in "power save" or dim mode. It used to be that the screen would dim on battery power after a few minutes of not typing. Now it's just always dim.
The last thing I did before this happened was install some software updates that I was prompted to install. It says the System Version is Mac OS X 10.5.6 (9G66) but I'm not sure what all it upgraded Saturday night (there were like 12 downloads).
Maybe I can use Time Capsule to back out the upgrade and see if that helps, though the one time I tried to do that was a nightmare.....

You can't use the brightness key on the keyboard to increase brightness?
Also, try a SMC and PRAM reset. Shut down, unplug the magsafe, take out the battery, and hold down the power button for at least five seconds. Next, put everything back and start up holding command-option-p-r until it chimes twice. Then let it start up normally.

Imac screen will dim after leopard install

Since installing leopard on my imac the screen will dim a small amount after awhile and then when I star to use the mouse it will brighten up again. Is this normal with leopard?
My Mac pro dors not do this.
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Ever since I installed Leopard on my iMac G5, periodically the screen will dim. This seems to be random, and not related to any specific program I might be running. The screen dims to the pre-sleep level, and doesn't brighten in response to anything I do other than sleep the computer and wake it again--no keystrokes or mouse clicks have any effect. I've tried everything in the Energy Saver prefs, and nothing seems to make any difference. Fortunately it doesn't happen all the time, or it'd be a real nuisance, but for that reason it would also be difficult to reproduce the effect for a repair person, in the event that it's a hardware problem. Has anyone else encountered this?

IPad lock screen renders wrong after reboot configurator 1.6

After much frustrating trial-and-error, I have finally got my iPads (20, ipad 2 and 3 mixed, for library checkout) to consistently restore properly. The only problem is that when you reboot the ipad the lock screen picture (installed through ocnfigurator) renders poorly. any ideas?

Similar problem here -- after a refresh the iPad wallpaper is crisp and centered, but then after rebooting the iPad the wallpaper is no longer centered and quite pixellated.

T510 screen brightness dims after startup

I've noticed this on our company's new T510's we're getting. When you start them up, the screens look to be full brightness. But after a few seconds, the screen dims half way or so and you must manually Fn+[Home] to make it brighter.
How do you change the default way this is set up so that it doesn't go dim after a few minutes? Thanks.
Solved!
Go to Solution.

Hi and welcome to the forum!
You can use lenovo Power Manger to create a new power scheme or modify the existing one to change such settings. Switch to Advanced mode to do so.
Hope this helps.
Maliha (I don't work for lenovo)
ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]
IdeaPad: U350
Apple:- Macbook Air [Snow Leopard]
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Screen remains dim after waking up on virtual terminals

I am having a strange issue when the display gets dim and won't get bright again, but only when I am no a vt.
I have an older (~4 yrs) Dell Studio 1737 with a Mobility Radeon inside with the xf86-video-ati driver:
$ lspci | grep -i vga
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV635/M86 [Mobility Radeon HD 3650]
$ pacman -Qq | grep xf86-video
xf86-video-ati
$ lsmod | grep radeon
radeon 754282 2
ttm 65132 1 radeon
drm_kms_helper 35086 1 radeon
drm 229990 4 ttm,drm_kms_helper,radeon
i2c_algo_bit 5391 1 radeon
i2c_core 22479 6 drm,i2c_i801,drm_kms_helper,i2c_algo_bit,radeon,videodev
When I leave my computer on one of the virtual consoles (vt2 - vt6) and it is idle for (I think) 10 minutes, it gets dim (via DPMS, I guess?) . However, I can't make it go bright again - after I move the mouse (which I am not sure makes any sense since I have no mouse in the vts) / press any key, nothing happens.
Now, the strange thing is, when the light is right, I can just see the text, but it is very, very dark and unreadable. Under normal circumstances I can see nothing and the screen can't be told apart form a blank black display. Actually, I had thought it was blank for a while until only recently, when I had the Sun shining against the display.
I wrote a simple script whose name is 'b':
echo 10 | tee /sys/class/backlight/acpi_video0/brightness
and I left the console as root (!) for 10 minutes (!) and when the screen went dim I called 'b' and nothing happened. I have no other ideas about how deal with this one - I tried reading and looking around, and have pretty much nothing. Does this problem ring any bells? Does anybody know how this can be fixed (apart from "just don't leave it on the vt for longer than 10 mins" or similar ;d - these have occurred to me already). Of course, if you need any more information about my hardware, I will provide it.
I am running a constantly updated arch.
wujek
Last edited by wujek.srujek (2013-06-12 21:53:03)

From the news page here...
http://xlr8yourmac.com/
See if it's related to this...
It also seems to be related to later OSX versions, like 10.8.x & 10.9.x
The 2012 macs (and later apparently) (also later OSX versions on earlier Macs can do it also), not waking normally from sleep after hours being in sleep. (noted here ...
http://www.xlr8yourmac.com/archives/feb13/022813.html#2012macswontwake
"Why 2012 iMac/2012 Mac Mini won't Wake After Hours of Sleep (Hibernates/Powers Off)")
The sleepimage file still reappears even if never slept. Delete it (hibernate off, etc) - within minutes its back.
A note on that here - http://www.xlr8yourmac.com/feedback/Chameleon_SSD_Optimizer.html
About iMac sleep...
http://forums.macrumors.com/showthread.php?t=1529750
Try this: "sudo pmset autopoweroff 0" and "sudo pmset standby 0"
http://xlr8yourmac.com/archives/sep13/091313.html#10.8.5SleepEjectTip
Two users reported that the opposite worked...
Try this: "sudo pmset autopoweroff 1" and "sudo pmset standby 1"

Screen auto-dims (after idle time)

Is there any way to turn off this 'feature'? It's very frustrating whenever I'm trying to watch a movie (say from nova online) or anything like that, I'd rather it be entirely in my control. (this is more than just environmental light detection, it's just randomly going dim after about 30 seconds of not being used.....very frustrating.

System Preferences>Energy saver>Sleep>Move the sliders to the right.
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White screen on startup after reboot

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Please update your profile about your Mac; model, RAM, etc. The more complete the easier for folks to assist. Do you have any 3rd party peripherals attached? USB? Firewire? Did any of the Software updates include the EFI firmware update? Did you read and follow the installation directions for this update properly? Will your Mac restart with the Install Disc?
Here are some troubleshooting steps for when you see a blank, gray screen
1. Make sure the latest firmware for your computer is installed. Check Apple Downloads for the latest versions.
2. Disconnect all peripheral devices, except for the Apple keyboard and mouse. This includes USB, FireWire, mini-DVI devices. If this resolves the issue, connect one device at a time, restarting after each one, until you've determined which device is causing the issue.
3. Remove third-party hardware upgrades such as memory (RAM). If this resolves the issue, add back one item at a time, restarting after each one, to isolate the issue.
4. Start up from your Mac OS X installation disc and check the hard disk with Disk Utility.
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Screen dims after a minute or so

How do you set the time it takes the screen to dim after not touching the notebook for a minute or so?

I was wondering the same exact thing. In the Energy Saver area, I have "Put the computer to sleep when it is inactive for:" set to Never, "Put the display to sleep when the computer is inactive for:" set to 1.5 hours, and "Automatically reduce the brightness of the display before display sleep" unchecked. I also have "Automatically adjust brightness as ambient light changes" unchecked in the Display settings.
Even with all these settings, the screen goes dim after about 1 minute of inactivity. Can't seem to figure out what would cause it.

My ipod 5 wont turn on the screen will dim and then it reboots but it keeps happening again

my ipod 5 wont turn on the screen will dim and then it reboots but it keeps happening again

Try:
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- Also try DFU mode after try recovery mode
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
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Apple Retail Store - Genius Bar

Screen too dark to read after reboot. How to fix this.

AFter reboot, screen so dark I can barely see it. How may I fix this!

Hi Jbr8d,
I apologize, I'm a bit unclear on the exact nature of the issue you are describing. Are you able to adjust the screen brightness, as outlined in the following article?
OS X Mavericks: Adjust your display’s brightness
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Intel-based Macs: Resetting the System Management Controller (SMC) - Apple Support
Regards,
- Brenden

MacBook Pro 2011- Allowed updates to install for iTunes software and Microsoft office (I think). After rebooting, computer wouldn't progress past grey apple screen with loading circle.

I have a MacBook Pro 2011. I allowed updates to install for iTunes software and Microsoft office (I think). After rebooting, computer wouldn't progress past grey apple screen with loading circle. No progression bar ever appeared. It just sits and spins. I tried rebooting with Command + Option + R + P and hearing the chime twice....this did not work.
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macbookpro2011ISU wrote:
I also tried Command +Option+R which took me to internet recovery. From there, I chose reinstall Mac OS X Lion 10.7 but it says my hard drive is locked so I wasnt able to select it.
I you upgraded to OS X 10.8, then use RecoveryHD by holding Command R at boot time (no option) and reinstall OS X over itself that way so your installing Mountain Lion.
Also Disk Uility can be used to Repair the Macintosh HD parttion.
Also you can use that RecoveryHD to format and install OS X onto a external drive, then option/alt key boot from it and access your files on the non-booting internal drive before erasing, reformatting and reinstalling OS X fresh.
Create a data recovery/undelete external boot drive
Most commonly used backup methods
..Step by Step to fix your Mac

After my iphone got wet in the rain the screen is dim. I have put it in a tub rice for 36 hours but it as not improved. The phone seems to be working ok just can't see the screen.

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Thank you. I told it to the apple store in Southampton and they were fab. I was lucky and there was no water damage, the water indicators didn't change colour. It was just bad luck my screen failed at the same time as it got wet!! Screen changed and all is well. Thank you Genuis Tom and West Quay!!

Security Suite Blue Screen after reboot

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Screen is dim after reboot

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