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Created attachment 513865 [details] Xorg.0.log Description of problem: Fresh Fedora 15 on a Hp laptop dv6-3194 A soon I connect an external monitor via the VGA port, both the laptop LCD display and the external monitor goes off then on every 20 seconds. This happens immediately when the monitor is connected before or after booting and without configuring it. Version-Release number of selected component (if applicable): Kernel: 2.6.38.6-26.rc1.fc15.i686.PAE Xorg: org-x11-drivers-7.4-2.fc15.i686 xorg-x11-drv-ati-6.14.1-2.20110525gitfe5c42f51.fc15.i686 xorg-x11-server-common-1.10.3-1.fc15.i686 Graphic card: 01:00.0 VGA compatible controller: ATI Technologies Inc Redwood [Radeon HD 5600 Series] How reproducible: With my config, all the time. Steps to Reproduce: 1.On a laptop, connect an external monitor via the VGA port. 2. 3. Actual results: Both laptop LVDS and external monitor are flashing every 20 seconds. Impossible to change the LVDS and monitor configuration. Expected results: Stop flashing and be able to configure LVDS and monitor. Additional info: I installed the kmod as explained here: http://forums.fedoraforum.org/showthread.php?t=155503&highlight=kmod+akmod+ati and the problem disappears. But this is not the good solution because the definition is limited to 1600x1600 and I need 2048x1536 This problem does not occurs with the same PC+monitor on a fresh Fedora 14. This means that the ATI chip and the monitor are OK. Also tested on Ubuntu 11.4 with he same config without problems. See Xorg.0.log for more details.
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