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Old 07-15-2013, 08:16 AM   #1
Registered: Jun 2007
Location: South Africa
Distribution: Linux Mint,Fedora, openSUSE, RHEL, SLES, Scientific Linux
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Multiple monitors with a multiheaded graphics card

I have a Dell Inspirion 5520 laptop running Linux Mint 15 which has the following graphics cards

 $ lspci | grep -i vga
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Thames XT [Radeon HD 7670M]
I've yet to find decent driver which will allow me to use 1 monitor which is connected via the VGA port, 1 monitor using the HDMI port and the laptop monitor. It seems to allow either 1 external monitor and the internal laptop monitor OR 2 external monitors without the internal laptop monitor.

Does anyone have any experience with multiple monitors on a multiheaded card?
Old 07-16-2013, 05:55 AM   #2
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I think you're doing well. These dual systems can feed the o/p from either card to the screen. HDMI usually only goes to the better card. Extra ports may exist in the GPU, but if they are not configured and not wired, they may as well not be there.

A bit of playing with xrandr or some other utility (lspci -vv) might tell you how many heads are functional on each card. Make sure you have 3 before sweating yourself. I imagine there will be 2.


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