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R7 M265 performance is lower than with built in Intel card on ubuntu 14.04 with ATI drivers installed

Question asked by vazia on Jan 5, 2016
Latest reply on Jan 30, 2016 by fabrixx

I have a laptop Dell Inspiron 7548 with built in Intel graphics card and ATI Radeon R7 M265 with Ubuntu 14.04

 

vasyl@insp7548:~$ lspci -v | grep "VGA" -A 12
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) (prog-if 00 [VGA controller])
  Subsystem: Dell Device 066f
  Flags: bus master, fast devsel, latency 0, IRQ 44
  Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
  Memory at d0000000 (64-bit, prefetchable) [size=256M]
  I/O ports at f000 [size=64]
  Expansion ROM at <unassigned> [disabled]
  Capabilities: <access denied>
  Kernel driver in use: i915_bpo


00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
  Subsystem: Dell Device 066f
  Flags: bus master, fast devsel, latency 0, IRQ 48
--
08:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Opal XT [Radeon R7 M265] (rev ff) (prog-if ff)
  !!! Unknown header type 7f
  Kernel driver in use: fglrx_pci

 

I've tried to install native ATI drivers from the website as well as from fglrx-updates. But in both cases my R7 card shown worst performance in games and during regular laptop usage like playing video, browsing then built in Intel card. I switched cards in Catalyst before testing.

 

UPD: Here are system details after I switched graphic card to Radeon in Catalyst :

vasyl@insp7548:~$ lspci -v | grep "VGA" -A 12
00:02.0 VGA compatible controller: Intel Corporation Broadwell-U Integrated Graphics (rev 09) (prog-if 00 [VGA controller])
Subsystem: Dell Device 066f
Flags: bus master, fast devsel, latency 0, IRQ 46
Memory at f6000000 (64-bit, non-prefetchable) [size=16M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915_bpo

00:03.0 Audio device: Intel Corporation Broadwell-U Audio Controller (rev 09)
Subsystem: Dell Device 066f
Flags: bus master, fast devsel, latency 0, IRQ 48
--
08:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Opal XT [Radeon R7 M265] (prog-if 00 [VGA controller])
Subsystem: Dell Device 066f
Flags: bus master, fast devsel, latency 0, IRQ 49
Memory at e0000000 (64-bit, prefetchable) [size=256M]
Memory at f7000000 (64-bit, non-prefetchable) [size=256K]
I/O ports at e000 [size=256]
Expansion ROM at f7040000 [disabled] [size=128K]
Capabilities: <access denied>
Kernel driver in use: fglrx_pci

vasyl@insp7548:~$ fglrxinfo
display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon R7 M265 Series
OpenGL version string: 4.4.13374 Compatibility Profile Context 15.20.1013

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