Some help please with my AMD - 7660D (weird slow down)

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Some help please with my AMD - 7660D (weird slow down)

Post by phill1978 »

Hi have i have Mint 15 KDE installed and I am playing all the games I normally play on Windows on Linux now ! :D this is amazing of course.

Ok i expect for another year the performance wont match windows due to / weyland / mir changes and closed source drivers needing to improve ( I can also hope AMD's open source will get better)

However I have a strange issue. The frame rate slows down and speeds up smoothly like there is a bottleneck? It may be a source engine thing? it happens on TF2, Left 4 Dead 2, but i also get a simular mouse slowdown and speed up on killing floors menus (which is a different engine)

Im not too sure what info you need but here is some:

Catalyst control center:

13.6 (beta)

4.2.12337 Compatibility profile Context 13.101
Video Memory: DDR3 1024MB

Processor : 4x AMD A10-5800K APU with Radeon(tm) HD Graphics
Memory : 7026MB (1046MB used)
Operating System : Linux Mint 15 Olivia

Resolution : 1920x1080 pixels
OpenGL Renderer :AMD Radeon HD 7660D
X11 Vendor The X.Org Foundation

Kernel : Linux 3.8.0-25-generic (x86_64)
Distribution : Linux Mint 15 Olivia

Resolution : 1920x1080 pixels
Vendor : The X.Org Foundation
Version : 1.13.3
Monitor 0 : 1920x1080 pixels
Vendor : Advanced Micro Devices, Inc.
Renderer : AMD Radeon HD 7660D
Version : 4.2.12337 Compatibility Profile Context 13.101
Direct Rendering : Yes


I provided this command in terminal: lspci -v -s `lspci | awk '/VGA/{print $1}'`

I recieved this output:

0:01.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Trinity [Radeon HD 7660D] (prog-if 00 [VGA controller])
Subsystem: Advanced Micro Devices [AMD] nee ATI Trinity [Radeon HD 7660D]
Flags: bus master, fast devsel, latency 0, IRQ 55
Memory at c0000000 (32-bit, prefetchable)
I/O ports at f000
Memory at fef00000 (32-bit, non-prefetchable)
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: fglrx_pci

I have it in the bios to use 1024MB of system RAM, and now it shows that i am using 1024MB ram in catalyst control center where as before the motherboard by default was using a small amount? However what concerns me above is that the output from terminal still shows 256m of VRAM?

Is that a legitimate value? imo that would cause slow down


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Re: Some help please with my AMD - 7660D (weird slow down)

Post by phill1978 »

any ideas?

I have some output from logs on system logs here:

Information [ 18.151] (II) fglrx(0): VESA VBE OEM Product Rev: 01.00
Information [ 18.151] (II) fglrx(0): AMD Video BIOS revision 9 or later detected
Information [ 18.151] (--) fglrx(0): [Video RAM: 1048576 kByte, Type: DDR3
Information [ 18.151] (II) fglrx(0): PCIE card detected
Information [ 18.151] (--) fglrx(0): Using per-process page tables (PPPT) as GART.
Information [ 18.151] (II) fglrx(0): board/chipset is supported by this driver (original AMD board)

Also I belive i am running libmesa 9.1.3-0ubuntu0.3

where can i get a terminal print of the mesa version ?

thanks again

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Re: Some help please with my AMD - 7660D (weird slow down)

Post by phill1978 »

I noticed this:

Driver: ATI Technologies Inc. AMD Radeon HD 7660D

Driver Version: 4.2.12337 Compatibility Profile Context 13.101
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 60 Hz
VendorID: 0x1002
DeviceID: 0x9901
Number of Monitors: 1
Number of Logical Video Cards: 1
Primary Display Resolution: 1920 x 1080
Desktop Resolution: 1920 x 1080
Primary Display Size: 21.77" x 12.24" (24.96" diag)
55.3cm x 31.1cm (63.4cm diag)
Primary VRAM Not Detected

Then i googled some more...

is this an AMD issue or a Steam issue?

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Re: Some help please with my AMD - 7660D (weird slow down)

Post by SilverNexus »

As far as I can tell, the IGP Devastator Radeons (which includes HD7660D) do not seem to have good support in Linux. I have one as well, and found disappointing performance improvements from my single-core 32-bit 2GHz computer with 2 GB RAM. There doesn't seem to be an driver that directly addresses these models (they seem to be based off the Cayman series of GPUs, though). The Catalyst driver is notoriously buggy, and seemed to have minimal effect when I installed it (it allowed me to play Neverwinter Nights in a VM, and that's about it).
I've had problems with some games not on Steam, so I think its poor driver support that affects you.
  • Minecraft does not display properly, and is unplayable since the ground enjoys disappearing (visually).
    SuperTuxKart lags when you or the AI uses the speed boost or nitro boost.
    SuperTuxKart uses light maps on several tracks, which do not work at all (making the track hard to see or completely invisible).
    Now that I think about it, the torturously slow save/load dialog loading in Battle for Wesnoth might be related to this, too.
I began to give up on the thought of 3D games working well on my computer in Linux. Maybe future kernels and iterations of drivers (or whatever Wayland will use for drivers) will have better support for these cards.
I wish there was a better answer, but all I see is poor support in all directions at this time.
They say that a three-year old can use Windows 8. I say that's a bit of a regression. When I was three, I could use DOS.

A computer without Windows is like a fish without a bicycle.

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