natty fail to resume after suspend; need to remove power and battery to boot thereafter.

[Observer]

I have an ASUS 1015B and when I try to resume from a suspend, the system resumes to a blank screen with the fan and hdd spinning. Power LED is on, no hdd LED activity though.

If I power off and reboot, it goes back to the same state. I have to remove the ac adapter + battery to boot.

Any suggestions on how I can trace the failure?
I tried CTRL-ALT-F1 etc ... no response.

Specs
Display 10.1" LED backlit WSVGA (1024x600) Screen
CPU AMD Fusion APU C50 1.0GHz (dual core) Processor *
Graphic Radeon HD 6250
Memory DDR3, 2 x SO-DIMM, 2GB ( Maximum 2GB ) *
Storage 2.5" SATA 250GB/320GB/500GB HDD *
Wireless Data Network WLAN 802.11 b/g/n@2.4GHz* Broadcom
Bluetooth V2.1+EDR*
Bluetooth V3.0+HS*
Camera 0.3 M Pixel Camera
Audio Hi-Definition Audio CODEC
Stereo Speakers
High Quality Mic
Interface 1 x VGA Connector
3 x USB 2.0
1 x USB 3.0
1 x LAN RJ-45 (10/100 Mbps)
1 x HDMI
2 x Audio Jack (Headphone/Mic-In)
1 x Card Reader : SD/ SDHC/ MMC