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I bought a new laptop, and have a problem with graphics card driver. I've been trying to fix problem for few days, please, help me if you know the answer. Hardware: Dell Inspiron 15 3541 with A6-6310 QUAD-CORE with Radeon R4 Graphics. 4GB Memory. Discrete graphic AMD R5 M230 2GB card.

For now, Ubuntu says that I have only 3,3 GB of RAM. As I understand other 700 Mb are used by enabled integrated AMD R4.

I want to use discrete card with its 2 GB of RAM and use all of my 4GB RAM.

I've tried to install proprietary drivers from AMD site. But Discrete card still doesnt't work and invisible.

The output of lspci -k | grep -EA2 'VGA|Display' terminal command:

00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mullins [Radeon APU A4-6000 with R2 Graphics]
Subsystem: Dell Device 0658
Kernel driver in use: fglrx_pci
--
01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Sun PRO [Radeon HD 8500M Series] (rev ff)
Kernel driver in use: fglrx_pci
Kernel modules: fglrx

when I triedcommand lspci -v it showed this output:

01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Sun PRO [Radeon HD 8500M Series] (rev ff) (prog-if ff)
!!! Unknown header type 7f
Kernel driver in use: fglrx_pci
Kernel modules: fglrx

I would really appreciate your help. Evgeniy.

  • Please edit your question and add output of lspci -k | grep -EA2 'VGA|Display' terminal command. – Pilot6 Aug 12 '15 at 20:20
  • Ok, I've just added the output. Evgeniy. – Evgeniy Aug 12 '15 at 20:27
  • And if you run sudo amdcccle can you switch to discrete card? – Pilot6 Aug 12 '15 at 20:28
  • no. I can't. It shows only integrated one. – Evgeniy Aug 12 '15 at 20:31
  • And how did you install the driver? – Pilot6 Aug 12 '15 at 20:32
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Normally the official AMD driver (fglrx) handle correctly hybrid systems.

Another way to go, is to force the use of the discrete card by using a custom /etc/X11/xorg.conf.

Some ressources to help you :

Be careful, in the Device section you must use the adequate :

  • driver used : fglrx for AMD official binary or radeon for opensource (best for 2D)
  • options are relevant to driver you install, man radeon or man fglrx to see which options are available
  • PCI bus obtained for you 01:00.0 given the result you provided of lspci

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