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12 Posts

11-28-2009

italy

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  • Message 31 of 52

Re: x200t video problem

2009-12-09, 9:34 AM

Thank you!!!

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13 Posts

05-05-2009

Dallas Tx

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  • Message 32 of 52

Re: x200t video problem

2009-12-16, 4:13 AM

Bump: 

 

Have not seen or heard anything from Lenovo on this.  Many of us are getting the exact same issue so obviously those who also experience this but do not use the forum must be calling. 


Does anyone have an update? Fix? 

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6 Posts

12-04-2009

San Francisco, CA

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  • Message 33 of 52

Re: Corrupt video on x200 tablet

2010-01-06, 4:05 AM

Same issues.  W7Pro, Latest drivers and bios on an X200.

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14 Posts

01-06-2010

USA

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  • Message 34 of 52

Re: Corrupt video on x200 tablet

2010-01-06, 21:11 PM

I think I may be having the same problem.  I posted this independently (as a separate message), but only now discovered this thread, so am posting here.  I just purchased a new x200 tablet (model 7450-9SU), which came with Vista Business and which I then upgraded to Windows 7 after getting the official Lenovo upgrade CD (all the software, including drivers, has been upgraded).  My machine exhibits a strange pixel flickering problem, which so far only occurs when coming out of hibernation.  The display produces rectangular regions (typically symmetrically located about the vertical center-line of the screen, and of various number and each of various sizes) of flickered pixels (i.e., different than what they should be), and then degrades as the regions get more numerous and/or of larger size.

 

I'm considering trying the suggested fix of going into the BIOS and disabling the Intel VT-d.  Any other suggestions?  Thank you.

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6 Posts

10-21-2008

Toronto Ontario Canada

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  • Message 35 of 52

Re: Corrupt video on x200 tablet

2010-01-13, 0:23 AM

Hi Forum Members and Other Lenovo Product holders,

 

The video problem exhibit flickering in Window 7 is due to the Intel VT-d ( Virtualization Techonology for Directed I/O). This function has the capability to virtualize processor and memory resources. Together, this roadmap may fail especially on Window 7 OS due it being new. By turning it off we stop this new techonology to intercept resources request. CPU will now talk directly to memory instead of passing through VT-d. I recommend turning all virtualization off. I have tested having VT-d turn off and my x200t worked properly.

 

For Solution:

Microsoft need to be notified that Win 7 may have problems working with Intel VT.

Intel need to be notified that their hardware need to be updated to work with Win 7.

Lenovo need to assist the above to solve issue promptly instead of turning off VT-d.

 

Bottom-Line: instead of blaming Lenovo please also take the time to push the other two (Microsoft and Intel) to find solution.

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2 Posts

07-24-2009

Down Under

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  • Message 36 of 52

Re: Corrupt video on x200 tablet

2010-01-13, 10:14 AM

Check out:

http://www.intel.com/assets/PDF/specupdate/320123.pdf

On Page 11....

Interesting issue 10, only work arounds and no fixes.

 

Charming.

 

AP

 

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4 Posts

01-14-2010

Israel

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  • Message 37 of 52

Re: Corrupt video on x200 tablet

2010-01-14, 6:39 AM

Had exactly the same issue resuming from Standby on AC.

 

Solved by installing older Intel GM45 Display Driver 8.15.10.1855 (64-bit):

http://www-307.ibm.com/pc/support/site.wss/MIGR-73678.html

 

Intel VT-d is enabled in BIOS.

 

No other issues so far.

 

X200T 7449-EKU, Windows 7 Ultimate 64-bit.

 

 

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14 Posts

01-06-2010

USA

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  • Message 38 of 52

Re: Corrupt video on x200 tablet

2010-01-14, 8:40 AM

Sorry for such a basic question: can someone tell me how exactly I turn off VT-d in the BIOS (or point me to a reference that describes how to do this)?  Thanks!

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27 Posts

10-07-2008

Norway

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  • Location: Norway
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  • Message 39 of 52

Re: Corrupt video on x200 tablet

2010-01-17, 17:49 PM
Hi, The easiest way to avoid this problem is to add a routine. For me this routine is, always open the lid under the same power state as you closed the lid. This way you avoid the problem for now at least. If you close the lid with electricity connected, don't open the lid before you have connected electricity again. If you plan to work on the train or plane, pull out electricity before you close the lid, and you can open it again without having electricity connected. But again, if you close the lid with electricity disconnected, also open the lid with electricity disconnected before you connect electricity again. Summarized is that the pc just have to be under same power state when you close and open the lid. Electricity off, electricity on, or battery off, battery on. Regards
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39 Posts

11-06-2009

Portland, OR USA

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  • Message 40 of 52

Re: Corrupt video on x200 tablet

2010-02-03, 20:15 PM

Agreed that, by dramatically modifying our behavior, we can minimize the problem. However, this still doesn't make the issue acceptable. Seriously, I have to go into the BIOS to make my computer work correctly? That is just not acceptable. How many hundreds or thousands of people are going through this issue? How many of them subscribe to this forum? How many of them know how to edit their BIOS settings?

 

Months of this issue, and yet no solution. This must be resolved.

 

Lenovo is the manufacturer of this product. They need to resolve the issue. It's not our responsibility to go around to all the possible participants. If hardware Lenovo's selling isn't compatible with software they're selling, then they need to address that, not the end user.

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