I've been using additional monitor with my laptop for a few weeks (extended setup), and today it started entering a power saving mode with no apparent reason. Laptop's monitor keeps working fine, laptop works fine too (i.e. it's only the external monitor that's in ps mode). When I replug external monitor it's fine again for about 2-3 minutes, then it enters power saving mode again.
The only thing I did I can possibly relate to this problem is I updated NVidia graphics card drivers yesterday. They were badly outdated before.
Specs:
- Laptop: Samsung R510
- External monitor (the one screwing up): LG Flatron E2351
- Graphics card: NVidia GeForce 9200M GS
- OS: Windows 7
- Power settings: high performance & never enter power saving mode 🙂
Best Answer
I administer nearly 500 machines in my job and from experience, this problem usually arises from issues with the monitor more than the graphics card or drivers and I've nearly always had to replace the monitor to get the machine up again. Is there another computer you can test it on to see if it still enters sleep mode just to narrow it down?