Problem with a new external monitor

I'm having some trouble with my new external monitor (Samsung BX 2231)
Last week when I connected the screen, there where no problems at all. I was using it as an extension of my desktop (as a second screen).
When I changed the wallpaper of the external monitor, I accidentally chose the wrong file (I'm not sure which one), From that moment, my dock is freezing.
Every time I tried to connect the monitor (as an second monitor), the dock is crashing.
I can use the monitor as an 'clone', then everything is working fine. When I change it back to be a second screen, the dock crashed again.
To solve the problem, I tried many options:
- Reset the PRAM
- Reset the SME
- Remove the file 'com.apple.windowsserver.plist
- Start the mac in 'safe' mode
- Remove all the images from the images folder (where I chose the 'wrong' file)
What are the other options? can someone help me?
Regards YkeBert

I have the same problem. Do you also have these in the system log:
kernel: Sound assertion in AppleHDADriver at line 1078
Thinking about reinstalling 10.8 and then applying 10.8.2.

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had a look around this forum and seen many questions about screen resolution when connecting to an external monitor but unfortunately, non that help me answer my problem.
got a brand new macbook a few months ago and today bought a HP v220 22" external monitor.
I am new to the idea of external monitors and am unsure what i am doing wrong settings-wise. it seems that no matter what resolution i set either my macbook display, or the external monitor display to. the external monitor is still not sharp.
Im not sure how to explain what i need but basically i need it to be so that things appear on the external the same size as they do on my macbook screen, so that i will have more space to work in on my external monitor (i am a graphics student) but at the moment what appears on the monitor is lieterally just a magnified version of my macbook screen, hence it lacks clarity.
the highest resolution offered in the menu for my macbook screen is 1280x800 and my external is recommended to be set at 1680x1050.
what settings should i have to get the resolution right?
i will be so so grateful if you can help. i think ive tried every single display setting but to no avail. so please help me!

The 13.3" screen on the MacBook running at 1280 x 800 will have a ppi (pixels per inch) of around 113. A 22" monitor running 1680 x 1050 will have a ppi of around 90. So it is natural that it will look magnified compared with the MacBook. The two displays have different a pixel pitch.
Since there are no monitors with ~113 ppi out there in the market, what you want to do with having the same size and sharpness between the MB and a monitor will not be possible.
If you ran the MB's screen at 1024 x 640 (not even sure if that is an available choice), then the two screens would match in terms of "magnification." But the MB isn't going to look very sharp running such a low, non-native format.

Problem with T400 and external monitor (1920x1200 resolution)

Hi there
My laptop:
ThinkPad T400 2767-C99* (graphics is: ATI Mobility Radeon HD 3470 256MB / X4500MHD (Switchable Graphics)), OS is WinXP
I just installed the newest video driver from the lenovo page (which also installs "ATI catalyst")
Externale Monitor:
I just bought a Samsung SyncMaster 2443FW, 24" TFT monitor with maximum resolution 1920x1200
Problem:
Monitor works great with my newer T400s and my old Acer laptop. However, with my T400 (described above), I can't make the monitor use the 1920x1200 resolution. However, all the other resolutions look ugly so I need it to work with 1920x120
- If i change the resolution by rightclicking on the Windows XP desktop (and then properties=>settings) and set the screen resolution there to 1920x1200, then my monitor only used a lower resoltion (1440x900) and I get a scrolling effect as I move my pointer across the screen
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Questions
Is that a hardware (maybe the graphic card does not support 1920x1200) or a software problem (maybe some problem with the driver) or just a matter of setting?
What can I do?
Help would be very much appreaciated!
*Original description: Based 2767-2JG: T9550(2.66GHz), 4GB RAM, 250GB 5400rpm HD, 14.1in 1440x900 LCD, 256MB ATI Radeon 3470HD, CDRW/DVDRW, Intel 802.11agn wireless, Bluetooth, Modem, 1GB Ether, UltraNav, Sec Chip, FPR, Camera, 9c Li-Ion, DOS License
Solved!
Go to Solution.

bfrey wrote:
Thank you for your answer.
I have already installed the newsest drivers from Lenovo. I don't really see why I should install a non-official driver. I am convinced that it must work somehow with the official driver.
Kind regards
there are plenty of instances where the official driver have glitches... just look around the forum to find instances of which.... while official drivers maybe better in most instances, there are always the odd case where it doesn't work as well as it should. If they perfectly out of box, then there would never need to be multiple revisions and updates.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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http://www.macaddict.com/issues/2005/11/reviews/lcm
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heath

I just bought a new external monitor (ASUS), and I have DVI adapter plug. When I connect it with my Macbook pro - the monitor remain black (even tho it is 'on')

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Here is a copy of the error message. Every Time I listen to a song and it end and I go to listen to a new song the Itunes Freeze up. This is on the New Version of Itunes. I have a Windows 7 32bit 3GB Ram 1TB harddrrive Space
<edited by host>
Thanks,
<edited by host>
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P7:
P8:
P9:
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Hello Philly,
I believe that when you reset your ipod(command given from the computer, right?) touch WHILE the ipod was updating, It cleared the system in the middle of writing files, thus corrupting(equivalent of cutting of in the middle of a sentence) the basic running system.
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~Remember, I am just giving an educated guess on limited information

Problem with a new external monitor

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