T42 LCD flicker

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bkhsms · #1 Post by **bkhsms** » Thu Feb 01, 2007 2:22 pm

T42 2373 M1U
OS: Vista Business N
Video: ATI Mobility Radeon 9600/9700 w/ 64M VRAM

I'm getting a slight flicker looks to be like a refresh rate issue on my T42. I used the Vista Business canned video driver for the ATI 9600/9700. I then updated all of the power management drivers from the Lenovo site. I then updated the ATI Catalyst drivers for the video adapter from the ATI website. The only thing I can see that may be the issue is the display is a Generic Display with the refresh rate set at 50Mhz. You can't adust the setting. Anyone else have the same issue and has found a workaround or resolution? There are no video drivers from Lenovo site as of yet. Should be an interesting couple of months.

agarza · #2 Post by **agarza** » Thu Feb 01, 2007 4:32 pm

Welcome to thinkpads.com forum.

This is a known and annoying problem, I've also installed Vista Ultimate on my T42p and the screen also flickers.
This problem also happens when using XP with Omega drivers, the screen flickers a lot.

Your only choice is to wait for Lenovo to update T4x series drivers to Vista as that driver is the only one has work for me

davenet · #3 Post by **davenet** » Sat Feb 03, 2007 10:57 pm

I just installed Vista on my T42 with the ATI FireGL T2 video card. I have the flicker and was hoping to find a resolution, so it looks like I'm stuck waiting too?

David

zverg · #4 Post by **zverg** » Thu Feb 15, 2007 10:49 am

See my post here regarding LCD flickering issues in Vista:

http://forum.thinkpads.com/viewtopic.ph ... 564#251564

At this time, Lenovo has released their ATI driver package, at least for the T42 with Radeon 9600. I have been using that driver package since release without any flickering.

Why was there a need to use the Omega drivers anyway? ATI does allow download of their mobile Radeon drivers nowadays, though I don't know when that changed. I do remember needing to run the Omega drivers in the past when IBM was slow to update the drivers.

Have any of you upgraded to the Lenovo driver package to confirm that this fixes the problem?

Edit: Well I just did a quick check and it looks like Lenovo did update the vid card driver on February 2nd, but it was a 2k/XP driver? I'll have to confirm what I'm using when I get out of work in a couple hours, but I know I don't have any flickering.

davenet · #5 Post by **davenet** » Thu Feb 15, 2007 1:08 pm

That would be great as I have been unable to find the correct driver to eliminate the flickering.

David

davenet · #6 Post by **davenet** » Fri Feb 23, 2007 1:09 pm

This is an update, the Windows Update detected a new video driver from ATI for the FireGL T2, but alas, the video still flickers.

David

ron1n · #7 Post by **ron1n** » Tue Mar 06, 2007 10:49 pm

yes even with new drivers my refresh rate is still 50hz and still flickers.

MrSpike · #8 Post by **MrSpike** » Mon Mar 12, 2007 10:21 pm

I get this as well with my wifes X60s. I can't see it when the brightness is on max but as soon as I turn it down I see the flicker. Has anyone come up with a solution yet?

davenet · #9 Post by **davenet** » Wed May 09, 2007 8:54 am

I just downloaded a new driver package from ATI released in April. the 50Hz refresh rate is still the only option and the flicker is still there. What is up with this? I don't understand why we have to wait for so long to get this fixed?

David

T42 LCD flicker

T42 LCD flicker

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