T21 LCD Contrast Adjustment.

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smsmasters · #1 Post by **smsmasters** » Thu Aug 17, 2006 1:39 pm

There doesn't seem to be any contrast adjustment for the lcd screen. How do I adjust the contrast of the lcd screen on my t21?

Thanks

#2 Post by **rkawakami** » Thu Aug 17, 2006 1:57 pm

As far as I know, there is no user-adjustable contrast control on the T2x series (or for that matter, most of the other Thinkpads that use TFT panels). The brightness can be controlled using the Fn+Home or Fn+End key sequences. Screen brightness levels can also be limited or automatically set when using battery power only via BIOS settings. What is the nature of your problem?

smsmasters · #3 Post by **smsmasters** » Thu Aug 17, 2006 2:22 pm

Thank you for your reply.

Basically, I am trying to calibrate my screen using test patterns, etc and I need to be able to adjust the contrast level.

Orevin · #4 Post by **Orevin** » Thu Aug 17, 2006 2:26 pm

If you click on the Advanced button for the display settings and then S3 Gamma, there are 3 buttons to adjust Gamma/Brightness/Contrast.

smsmasters · #5 Post by **smsmasters** » Thu Aug 17, 2006 2:31 pm

Orevin wrote:If you click on the Advanced button for the display settings and then S3 Gamma, there are 3 buttons to adjust Gamma/Brightness/Contrast.

Thank you for the suggestion. Yes, I have indeed checked this menu, however, all I see are 3 options to adjust gamma for the red/green/blue channels. I can't seem to find any contrast options.

Orevin · #6 Post by **Orevin** » Thu Aug 17, 2006 5:05 pm

There might be a difference between the T20-22 and the T23 in the settings...
Did you install the latest driver from IBM for your OS?

smsmasters · #7 Post by **smsmasters** » Fri Aug 18, 2006 4:19 am

Orevin wrote:There might be a difference between the T20-22 and the T23 in the settings...
Did you install the latest driver from IBM for your OS?

Thank you for replying. Yes, I have installed the latest video driver from that link and I still cannot seem to find any contrast options, only gamma.

I am using windows xp, how about you? What driver version do you have?

T21 LCD Contrast Adjustment.

T21 LCD Contrast Adjustment.

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