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Linux - Laptop and Netbook Having a problem installing or configuring Linux on your laptop? Need help running Linux on your netbook? This forum is for you. This forum is for any topics relating to Linux and either traditional laptops or netbooks (such as the Asus EEE PC, Everex CloudBook or MSI Wind).

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Old 07-11-2013, 12:39 PM   #1
sw@x
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Registered: Jul 2013
Location: Belgium
Distribution: Fedora 19
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HDMI, two Radeon graphic cards


Hi everyone,

I use a laptop having two graphic cards as a home cinema computer. It works using the VGA output, however it doesn't using the HDMI output. I want to use the HDMI since the VGA input of my TV seems limited to the 1280x1024 resolution.

In the display configuration, when the HDMI connection is used, the TV screen isn't detected.

Using lspci I can see that Linux recognizes my two graphic cards (embedded radeon HD3200 and the radeon HD3650). It seems that the Radeon open source driver is used since I can see it in lsmod. However I don't know which of my two graphic cards is used by the radeon driver.

I suppose that it's the embedded one since the HDMI output doesn't work, and that maybe switching to the HD3650 will make things better.

Thus the question is how can I force Linux tu use the HD3650? Note that I can't disable the embedded graphic card in the BIOS.

Thanks for your advices,
Arnaud

Last edited by sw@x; 07-11-2013 at 12:40 PM.
 
Old 07-11-2013, 12:54 PM   #2
colorpurple21859
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Maybe this will help
http://www.linuxquestions.org/questi...8/#post4830372
Xorg will have to be restarted to use the other card.
May have better luck using the driver from radeon

Last edited by colorpurple21859; 07-11-2013 at 12:57 PM.
 
Old 07-11-2013, 01:09 PM   #3
sw@x
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Thanks, it seems being what I need. "cat /sys/kernel/debug/vgaswitcheroo/switch" shows that the embedded graphic card is currently used. The HDMI issue probably comes from this fact.

Unfortunately, following the instructions:

##
First, you will need a hybrid graphic which allows switcheroo's usage (of course). You can check that with following command (typed as root):

Code: grep switcheroo /var/log/messages

The output should be a line like this one:

Code: Jul 4 12:44:00 darkstar kernel: [ 8.609135] VGA switcheroo: detected switching method \_SB_.PCI0.GFX0.ATPX
##

The grep command gives no output on my computer. Should I deduce that the switcheroo solution can't work with my configuration?
 
Old 07-11-2013, 01:44 PM   #4
colorpurple21859
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If
Quote:
cat /sys/kernel/debug/vgaswitcheroo/switch
is showing the correct output then it should work. I would recommend to log out Of X into a terminal run
Code:
echo ON > /sys/kernel/debug/vgaswitcheroo/switch
Code:
echo IGD > /sys/kernel/debug/vgaswitcheroo/switch
Code:
echo DIS > /sys/kernel/debug/vgaswitcheroo/switch
. Then restart X. If you get a black screen after running the last one then hit the up arrow key and enter to rerun the second command to get your display back.

Last edited by colorpurple21859; 07-11-2013 at 01:46 PM.
 
Old 07-12-2013, 04:39 AM   #5
sw@x
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Location: Belgium
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Thanks for your help but it doesn't work.

I switched to console with ctrl+MAJ+F2. Then I wrote init 3 to shutdown X and I log as root. I wrote the three commands and after the third one the screen becomes black. Thus I'm forced to reset the IGD graphic card (in fact I missed your last sentence and I just rebooted the computer).

Maybe there is a way to totally disable the embedded graphic card? I don't need it since the laptop is always plugged to sector.

Last edited by sw@x; 07-12-2013 at 04:47 AM.
 
Old 07-12-2013, 03:24 PM   #6
adamk75
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Please show us your full /var/log/Xorg.0.log file and the output of 'dmesg | grep drm'

Adam
 
Old 07-12-2013, 10:06 PM   #7
colorpurple21859
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Also show output of 'dmesg | grep radeon'
 
Old 07-13-2013, 04:16 AM   #8
sw@x
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Registered: Jul 2013
Location: Belgium
Distribution: Fedora 19
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The three requested outputs are attached to this post (currently the laptop isn't plugged to any external screens, tell me if I have to retrieve outputs just after trying switching cards).
Attached Files
File Type: log Xorg.0.log (50.5 KB, 4 views)
File Type: txt radeon.txt (2.2 KB, 3 views)
File Type: txt drm.txt (4.3 KB, 3 views)
 
Old 07-14-2013, 08:36 PM   #9
colorpurple21859
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It looks like your embedded card is hooked to your display and vga out and your discrete card is hooked to your display, vga out, and HDMI. Try using the following as a boot parameter and see if the discrete card will get used instead of the embedded card.
Code:
fbcon=map:1
If so, then you might be able to select the hdmi output

Another option is to install the catalyst fglrx driver and use it in place of the radeon driver. The catalyst fglrx driver makes it easier to switch between the two cards. The downside is kernel updates can be problematic.

Last edited by colorpurple21859; 07-14-2013 at 08:46 PM.
 
Old 07-16-2013, 05:09 AM   #10
sw@x
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Registered: Jul 2013
Location: Belgium
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Thanks, I'm not home for a week I will try when I come back. I will tell you if it has worked afterwards.
 
  


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