Brightness goes to zero at restart

I'm still having the same issue, despite many updates. My computer resets the brightness to zero when I use a timed startup. I know it's a small issue, but when is Mac going to put out an update that resolved this issue that started when I went to Leopard?

I'm having the same problem, despite the recent 10.5.3 update. For me, too, it happens just when I use a scheduled startup. This is with a G4 iMac, so it doesn't seem to be limited to Intels

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Screen goes to zero Brightness

Every time I reboot, my screen automatically goes to zero brightness. I have been having issues with the computer not responding (which I've yet to resolve) but this problem just started happening. Could the two be related? I have an ibook G4 2004 14" screen 256mb 40 g
Any help is much appreciated.
D

Hi Exdj99,
Welcome to Apple Discussions
Yes, they could be related, but it's hard to say at the moment. Can you get the screen to lighten up? How do you know the brightness goes to zero instead of the screen not turning on? Can you see the outline of the images on the display? When does your computer not respond? Do you try to start it on the battery, power cord, or both?
You may want to look at/try...
Knowledge Base Document #300552 on My computer won't turn on (Display troubleshooting
Knowledge Base Document #106214 on Troubleshooting Startup Issues
Knowledge Base Document #14449, which covers Resetting Powerbook and iBook Power Management Unit (PMU)
Jon
Macbook 2.0 White (100Gb HD 2Gb RAM) Mac Mini 1.42Ghz, iPod (All), Airport (Graphite & Express), G4 1.33Ghz iBook, G4 iMac 1Ghz, G3 500Mhz, iBook iMac 233Mhz, eMate, Power Mac 5400 LC, PowerBook 540c, Macintosh 128K, Apple //e, Apple //, and some more... Mac OS X (10.4.5) Moto Razr, iLife '06, SmartDisk 160Gb, Apple BT Mouse, Sight..

When ever the power goes out or I restart my iMac the external hard drive that is used by Time Machine for backups is dismounted ?

When ever the power goes out or I restart my iMac the external hard drive that is used for backups by Time Machine is dismounted and all backups are gone. I can reselect it and it will start working again, but I am worried if the iMac hard drive should fail will I be left without a backup ?

fzgy wrote:
"Mac OS X can't repair the disk. You can still open or copy files on the disk, but you can't save changes to files on the disk. Back up the disk and reformat it as soon as you can."
It's possible a heavy-duty 3rd-party disk repair app can fix it, but they're expensive (DiskWarrior is about $100), and there's no guarantee it can do it.
Am prompted to reformat but I don't have a good understanding of what this means and how to do it.
That will erase it. See Time Machine - Frequently Asked Question #5.
It sounds very much like the disk is beginning to fail, although it's possible there's a bad port, cable, connection or power supply (if it has its own).
I'd suggest getting a new one, and using it for your Time Machine backups; once you have a good backup there, reformat the old one (and select Security Options to write zeros to the whole drive -- if that fails, you know the drive is toast). Use it for secondary backups, per FAQ #27. If it has failed, get a second new one for secondary backups.

[SOLVED] Systemd forcing laptop brightness down to zero.

Can somebody please, pretty please, explain to me how I can tell systemd to STOP turning off my laptop brightness half-way during boot?
Started Load/Save Screen Backlight Brightness of acpi_video0.
Turns brightness down to zero. According to the man page:
[email protected] is a service that restores the display backlight brightness at early-boot and saves it at shutdown. On disk, the backlight brightness is stored in /var/lib/backlight/.
On my Arch it is actually in /var/lib/systemd/backlight/acpi0. I tried modifying the value to anything between 1 and 100 but it the file is reset to 0 every boot, maybe this is normal.
I also tried to disable the damn systemd-backlight service but it re-enables itself every boot too.
Please can somebody help me, I'm pulling my hair out. I have tried various kernel parameters and acpi_backlight=vendor works but forces brightness to 100% and I can't change it. (unless of course if I force /sys/class/... which is not a solution)
Last edited by beanaroo (2013-10-12 07:30:49)

It definitely isn't normal for it to keep going to 0. Mine currently has the value 12 in it. (My file is /var/lib/systemd/backlight/acpi_video0.) I'm not sure if it makes a difference that I have laptop-mode-tools managing the backlight, though. But I don't see it go to 0 at any point during boot.
That is, unless something somewhere is configuring it this way, this sounds like a bug and the solution you're using a work around. Not suggesting you shouldn't use it, of course, but maybe worth reporting, too?
Last edited by cfr (2013-10-16 02:25:51)

The screen of my imac always goes to the maximum exposure. Then the light icon on the screen. After reducing the brightness goes my screen after a few minutes back to the maximum intensity with the brightness icon back on my TV screen.

The screen of my imac always goes to the maximum exposure. Then appear the light icon on the screen. After reducing the brightness goes my screen after a few minutes back to the maximum intensity with the brightness icon back on my screen.

Try resetting the SMC and if that doesn't work then reset the PRAM too.
SMC RESET
Shut down the computer.
Unplug the computer's power cord and all peripherals.
Press and hold the power button for 5 seconds.
Release the power button.
Attach the computers power cable.
Press the power button to turn on the computer.
PRAM RESET
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.

My screen goes black then macbook restarts...what's happening?

my screen goes black then macbook restarts...what's happening? This has been happening often (3-4 times per day). Not sure what kind of problem I am dealing with. ideas?

I have had Similar issues in my case it only seems to happen when the laptop is plugged into power. also if you shine a light through the apple logo on the front of the case you can see the LCD is actually running as is the OS it would appear the backlight is off. In my case I can resume operation by taping the F1 or F2 keys. All be it an annoying finx it is at least a simple one

Extended network often goes to zero

Hi.
Surprisingly my extended network often goes to zero. I've a traditional wep encripted extended network using two airport extreme. When the network goes to zero I see the indicator on the upper right corner disappear anche the green light of the airport becomes flashing yellow. After 30 seconds the situation auto-fixes.
How can I solve the problem? I've just checked the main range, it works properly!.
Thanks in advance for your help.
Regards.

try putting the second router in bridge mode, use Airport Utility manual button to do that. Choose the internet tab/connection sharing/bride mode

Brightness goes to dark automatically

I will be sitting at my computer and suddenly the "brightness" icon comes up on the screen and my brightness goes from full to completely black. I then press F2 multiple times to get it back to full brightness but then it goes all the way down to black on its own again.

Please read this whole message before doing anything.
This procedure is a test, not a solution. Don’t be disappointed when you find that nothing has changed after you complete it.
Step 1
The purpose of this step is to determine whether the problem is localized to your user account.
Enable guest logins and log in as Guest. For instructions, launch the System Preferences application, select Help from the menu bar, and enter “Set up a guest account” (without the quotes) in the search box.
While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
As Guest, test. Same problem(s)?
After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
Step 2
The purpose of this step is to determine whether the problem is caused by third-party system modifications that load automatically at startup or login.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. The instructions provided by Apple are as follows:
Be sure your Mac is shut down.
Press the power button.
Immediately after you hear the startup tone, hold the Shift key. The Shift key should be held as soon as possible after the startup tone, but not before the tone.
Release the Shift key when you see the gray Apple icon and the progress indicator (looks like a spinning gear).
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on some Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
Test while in safe mode. Same problem(s)?
After testing, reboot as usual (i.e., not in safe mode.) Post the results of steps 1 and 2.

Formula automatically populate the date when inventory goes to "zero"

Hello- I am trying to create a formula that will automatically populate the date when inventory goes to "zero".
Date: Row 3 Columns P-AB
Inventory: Rows 5-400 Columns P-AB
Column J rows 5-400 is where I want the inventory run-out date to auto-pop
with so many rows of data, where stock goes to "O" will clearly vary per row. I want this formula, to look between Col. P-AB and tell me in Col. J when my inventory goes to "zero"
Thank you!

Thank you for your reply...using your formula, I'm still not coming up with inventory run-off date from row 3.
I need Column J to give me the date when my inventory is "0".

Mac Mini sound goes to zero on its own.

I have had my mini since 2009. This issue has happened intermittantly since I got it but has happened several times in the last while. The sound output goes to zero. On it's own. I go into system preferences to sound and slide the bar back to my desired level and all is ducky until it happens again. I suppose I should have spoken to Apple about this when Applecare was still in play but it did not happen much. Silly me. Any ideas about the cause? I am guessing this is mobo related and a cure will be costly. If I go that route.
I run a line out of the headphone jack that splits to my amp and a set of headphones.

Well, it was just a shot at a possibilility.
Safe Boot, (holding Shift key down at bootup), & use Disk Utility from there to Repair Permissions, trash these files...
Users/YourUserName/Library/Preferences/com.apple.soundpref.plist
/Users/YourUserName/Library/Preferences/com.apple.systempreferences.plist
Reboot.

Upgrade os v4.5 BB curve 8310 to higher compatible os & file free always goes to zero byte

Hi all,<br>Let me introduce myself first, my name is hasya from Indonesia, I am using BB curve 8310 with os v4.5.0.124, There are 2 Things would like to ask for looking for solve/solutions as follow:<br>1. Can I upgrade my BB curve 8310 os v4.5 To higher compatible os?kindly please let me know how to do it and where I can get that software / higher os?<br>2. My file free always goes to zero byte so make my bb is hank or not responding, I already run memory cleaner from BB but can not solve that problem,I always do hard reset (battery pulled out) to get more file free, kindly please let me know how to maintain or keep my file free is not going to zero byte, and please let me know if there is best software can solve it
Solved!
Go to Solution.

S 4.5.0.188 is the highest and latest available release for the 8310.
Here are directions and the download.
http://www.blackberryforums.com/general-8300-series-discussion-curve/236833-latest-os-8310-4-5-0-313...
Turn off your memory cleaner, it is worthless to your situation and does NOT clear additional memory for your device, it just wastes battery and resource, and ONLY cleans already deleted memory to a high secure government specification. Nice for the FBI, CIA, drug and p0rn dealers, worthless for you.
For low memory issues:
First thing? Check the File Free at Options > Status, what is the number at File Free?
Now, leaving the device powered ON, remove the battery of your device, hold a minute, replace and reboot.
What is the File Free now?
Read this: http://www.blackberryforums.com/general-blackberry-discussion/116396-managing-your-bb-memory-lost-ca...
And this: http://www.blackberryforums.com/general-blackberry-discussion/112029-losing-call-logs-sms-emails-opt...
Additional links to read:
http://www.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB15345&sliceId=SAL_Pub...
http://www.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB14320&sliceId=SAL_Pub...
http://www.blackberry.com/btsc/dynamickc.do?externalId=KB14213&sliceId=SAL_Public&command=show&forwa...
1. If any post helps you please click the below the post(s) that helped you.
2. Please resolve your thread by marking the post "Solution?" which solved it for you!
3. Install free BlackBerry Protect today for backups of contacts and data.
4. Guide to Unlocking your BlackBerry & Unlock Codes
Join our BBM Channels (Beta)
BlackBerry Support Forums Channel
PIN: C0001B7B4 Display/Scan Bar Code
Knowledge Base Updates
PIN: C0005A9AA Display/Scan Bar Code

What to do if you boot the downloaded application goes blue screen and restarts iPhone

what to do if you boot the downloaded application goes blue screen and restarts iPhone

Always a bad thing to forget passwords. Here you go.
http://support.apple.com/kb/HT1212

IMac volume goes to zero

Since updating to Yosemite, every time I start up my iMac's volume goes to zero, despite being set to full volume in the sound control panel. The mute button is not checked so that is not the problem.

I tried trashing the audio preferences in the Library folder, and still have the same problem. The volume is fine in the System Preferences Sound Control Panel, but zero in the menu bar at startup every time.

Oracle OHS HTTP Resquest increase and never goes down until I restart OHS

Hi I have several problems on IAS 10.1.3.3.0 with the OHS (Oracle Http Server).
In the graphics I see that the HTTP Request increase very fast and never goes down until I restart the OHS
I monitoring that with DMSTool as the example:
dmstool /baslije15/OHS:28077:6100/OHS/connection.active /baslije15/OHS:28077:6100/OHS/handle.active /baslije15/OHS:28077:6100/OHS/request.active /baslije15/OHS:28077:6100/OHS/handle.maxTime /baslije15/OHS:28077:6100/OHS/handle.minTime /baslije15/OHS:28077:6100/OHS/handle.avg /baslije15/OHS:28077:6100/OHS/request.completed /baslije15/OHS:28077:6100/OHS/busyChildren.value /baslije15/OHS:28077:6100/OHS/readyChildren.value /baslije15/OHS:28077:6100/OHS/numChildren.value
The result is:
Fri Jan 16 15:20:15 ARST 2009
/baslije15/OHS:28077:6100/OHS/busyChildren.value 18 processes
/baslije15/OHS:28077:6100/OHS/connection.active 126 threads
/baslije15/OHS:28077:6100/OHS/handle.active 21442 threads
/baslije15/OHS:28077:6100/OHS/handle.avg 632138 usecs
/baslije15/OHS:28077:6100/OHS/handle.maxTime 602716011 usecs
/baslije15/OHS:28077:6100/OHS/handle.minTime 0 usecs
/baslije15/OHS:28077:6100/OHS/numChildren.value 56 processes
/baslije15/OHS:28077:6100/OHS/readyChildren.value 38 processes
/baslije15/OHS:28077:6100/OHS/request.active 21549 threads
/baslije15/OHS:28077:6100/OHS/request.completed 664971 ops
Fri Jan 16 15:20:20 ARST 2009
/baslije15/OHS:28077:6100/OHS/busyChildren.value 13 processes
/baslije15/OHS:28077:6100/OHS/connection.active 126 threads
/baslije15/OHS:28077:6100/OHS/handle.active 21437 threads
/baslije15/OHS:28077:6100/OHS/handle.avg 632154 usecs
/baslije15/OHS:28077:6100/OHS/handle.maxTime 602716011 usecs
/baslije15/OHS:28077:6100/OHS/handle.minTime 0 usecs
/baslije15/OHS:28077:6100/OHS/numChildren.value 56 processes
/baslije15/OHS:28077:6100/OHS/readyChildren.value 43 processes
/baslije15/OHS:28077:6100/OHS/request.active 21544 threads
/baslije15/OHS:28077:6100/OHS/request.completed 665090 ops
Fri Jan 16 15:20:26 ARST 2009
/baslije15/OHS:28077:6100/OHS/busyChildren.value 4 processes
/baslije15/OHS:28077:6100/OHS/connection.active 124 threads
/baslije15/OHS:28077:6100/OHS/handle.active 21446 threads
/baslije15/OHS:28077:6100/OHS/handle.avg 632191 usecs
/baslije15/OHS:28077:6100/OHS/handle.maxTime 602716011 usecs
/baslije15/OHS:28077:6100/OHS/handle.minTime 0 usecs
/baslije15/OHS:28077:6100/OHS/numChildren.value 56 processes
/baslije15/OHS:28077:6100/OHS/readyChildren.value 52 processes
/baslije15/OHS:28077:6100/OHS/request.active 21553 threads
/baslije15/OHS:28077:6100/OHS/request.completed 665259 ops
As you see request.active value is very high for 124 active connection and this value never decrease during the day.
After 8pm when the mayor of the user stop working it stay high stable but its never decrease.
Any idea?? I spent 2 weeks checking all parameters of http.conf but I haven't results.
TIA
Marcelo

Hi Roberto, this are some of the parameters on httpd.conf
Timeout 300
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15
MinSpareServers 5
MaxSpareServers 20
StartServers 5
MaxClients 2500
MaxRequestsPerChild 0
Putting KeepAlive to "off" what consequence my be have?
Can you suggest me some tuning?
We have a large amount of users (600) and a lot of webservice invocation with large transactions (1 to 10 sec)
TIA
Marcelo

AirPort Extreme signal goes to zero

My AirPort Extreme base station is about 11 months old. Worked flawlessly for several months, then a few months ago it developed a problem in that the wireless signal strength (as seen by an iBook, two PowerBooks and a PowerMac G4 all using Apple cards) sometimes goes to ZERO. No bars, and the network disappears from the menu on all the clients, even the one sitting 10 feet away. Visually, only the center light is on, steady white. The problem is corrected by unplugging/replugging the power cord on the base station.
This sometimes occurs 2-3 times a day, sometimes it does not occur for several days in a row. It has happened in the middle of the day with all users active and it has happened at night with no one active (noticed when the first user tried to connect next morning). The problem may have started with a new level of AirPort software or firmware (we are running the latest available of both, with 3 clients on 10.4.8 and one on 10.3.9) but since the problem is sporadic we didn't associate it with any patch at the time.
The base station is running infrastructure mode, bridging to a wired Ethernet network, so it is not acting as DHCP server. (The wired network clients see no disruption in service when the AirPort goes dead.) 128-bit WEP and access control by MAC address are active.
Any ideas?
PowerMac G4 MDD Mac OS X (10.4.8)

Hmmm, unfortunately, it sounds like the AirPort Extreme card inside your AEBS maybe faulty. Since you already know connecting wired clients to the AEBS is not an issue, would it be possible to remove the AEBS from the current network configuration, and install it as a new standalone wireless network...and then check to see if repeats the drop-outs when wireless clients connect to it? The rationale would be to eliminate any possibility that when it's connected to a wired network may be the cause of the wireless drop-outs.

Brightness goes to zero at restart

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