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 They were badly outdated before.
- 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 :)