Red Hat Bugzilla – Bug 845693
dual head does not work on radeon HD 6500
Last modified: 2013-08-01 09:43:50 EDT
Description of problem:
I have what looks like a:
houston:~$ lspci | grep VGA
01:00.0 VGA compatible controller: ATI Technologies Inc NI Turks [AMD Radeon HD 6500]
I have 3 monitors-- my main Samsung LED 23" (SyncMaster PX2370) over HDMI, and two satellite smaller monitors on either side, both Acer LED 20" (one on the VGA port and one on the DVI-D port).
After doing a fresh install of fc17 on x86-64, upon bootup I only get 2 monitors working (the main Samsung LED 23" and one of the Acer LED 20"). However, the 3rd monitor is not working and the X login screen seems to be in the blank 3rd monitor. This 3rd monitor is connected to the DVI-D port of the graphics card.
If I only boot with two monitors (the Samsung 23" over HDMI and one of the Acer monitors over VGA, I still can't get a working system as the Acer over VGA is partly garbled.
So... trying with 3 monitors gets me 2 working, but unable to log in because the 3rd one is where the login prompt is. Trying with 2 does not work as one of the Acer monitors has half the screen garbled.
Interestingly if I boot with only my main Samsung over HDMI monitor, and then plug in both Acer monitors after login, everything works perfectly. I just can't boot with more than one head.
My apologies for the long description. Let me know if you need additional data.
Version-Release number of selected component (if applicable):
I don't know if these are relevant, but:
Steps to Reproduce:
This setup worked perfectly in fc16.
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