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I just have this strange behavior and couldn't find out what is wrong. Anyone ever saw this kind of error? I checked the xorg log, but wasn't able to identify any obvious error.

My setup:

  • Notebook as first monitor (1366x768)
  • Samsung P2370 as secondary monitor (1920x1080)
  • Dell Inspiron 15R
  • Ubuntu 12.04 fully updated
  • ATI proprietary drivers

lspci relevant output:

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Seymour [Radeon HD 6400M Series]

fglxinfo output:

OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 7400M Series
OpenGL version string: 4.2.12172 Compatibility Profile Context 12.10.17

I can attach xorg conf/log, if someone points me the relevant sections.

Thanks for any help.

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