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Honor Student
Posts: 3
Member Since: ‎02-28-2013
Message 1 of 4 (792 Views)

ZR2440w out-of-sync on wakeup



HP ZR2440w

Original Display Port cable

Lenovo Tiny M92p, machine code 3224, Intel HD2000 graphics, latest BIOS v59

Debian Squeeze Linux 3.2.20, xf86-video-intel 2.15.0.

Keyboard and mouse connected to HP screen, HP screen connected to USB3 rear port on Lenovo Tiny.

Power button and menu button disabled.



Problem: on coming out of sleep, HP screen often (but not always) shows "Out of range" message. According to it, Horiz. freq. is 89kHz. V sync is correctly 60Hz. Turning the screen off and on via the switch brings up a normal picture.

Forcing the video mode, 1920x1200 @ 60.00 Hz (GTF) hsync: 74.52 kHz in Xwindows does not help. We tried Windows7, same problems.


We have 50 such machines deployed in a 24/7 setup. This error is driving our support team crazy.

Any ideas?

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Associate Professor
Posts: 1,637
Member Since: ‎05-17-2011
Message 2 of 4 (750 Views)

Re: ZR2440w out-of-sync on wakeup

Have you tried to change the power save mode of the monitor?
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Honor Student
Posts: 3
Member Since: ‎02-28-2013
Message 3 of 4 (748 Views)

Re: ZR2440w out-of-sync on wakeup





we tried both changing the energy save mode as well as disabling DDC.

Still, sporadic out-of-range errors persist.



Posts: 1
Member Since: ‎09-26-2013
Message 4 of 4 (636 Views)

Re: ZR2440w out-of-sync on wakeup



We also have this issue with one of our deployments, she occasionally has to turn it off and then back on, sometimes even the power button won't work, and unplugging the power cable will be the only way to clear the issue. We've tried swapping out the monitor with one of the same and it still happens.


I've tried several things, bios updates, video driver updates, and even installing the monitor driver.


Windows 7 64bit

The PC model is XZ794UT#ABA, if that helps any. It is the only one we have that has one of these monitors.


Any help would be appreciated or things to try.

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