Mailinglist Archive: radeonhd (255 mails)

[Kunal Gangakhedkar <kunal.gangakhedkar@xxxxxxxxx>]

Hi Alex,

On Tuesday 03 Nov 2009 8:38:55 pm Alex Deucher wrote:
> On Tue, Nov 3, 2009 at 10:00 AM, Kunal Gangakhedkar
> <kunal.gangakhedkar@xxxxxxxxx> wrote:
> > The basic radeonhd X driver with the mainline radeon GPU driver gives me 
> > pretty nice X environment.
> > However, there are two issues that I'd like to know more about:
> >
> > 1.
> > the X.org logs show that the entire VRAM is not being used - instead only 
> > 256M out of the 1G are being used.
> >
> > The msg from Xorg.log is:
> > (II) RADEONHD(0): The detected amount of videoram exceeds the PCI BAR 
> > aperture.
> > (II) RADEONHD(0): Using only 262144kB of the total 1048576kB.
> > (--) RADEONHD(0): VideoRAM: 262144 kByte
> >
> > I'm attaching gzipped Xorg.0.log with this mail.
> > Even the lspci output (included below) says that the memory is 256M
> > whereas ATi catalyst driver in pre-installed Windows Vista Home Premium 
> > shows and uses full 1GB of VRAM.
>
> 256 MB is the max PCI aperture size.  that's the largest amount the
> CPU can access.  The GPU, however, can access the entire amount.
> Support for using the extended memory will come eventually with kms.

Aah, my bad, I got confused between who's reporting the memory..
Sorry for my mistake - your explanation makes sense :)
 
> > 2.
> > I tried to use KMS which is recently introduced - just for testing what 
> > it's all about.
> > The kernel logs have following lines when trying to enable KMS:
> >
> > Nov  2 00:52:42 plutonium kernel: [  499.645739] [drm] Module unloaded
> > Nov  2 00:53:03 plutonium kernel: [  519.771264] [drm] radeon kernel 
> > modesetting enabled.
> > Nov  2 00:53:03 plutonium kernel: [  519.771264] radeon 0000:01:00.0: 
> > setting latency timer to 64
> > Nov  2 00:53:03 plutonium kernel: [  519.781298] [drm] radeon: Initializing 
> > kernel modesetting.
> > Nov  2 00:53:03 plutonium kernel: [  519.781298] 
> > [drm:radeon_driver_load_kms] *ERROR* Failed to initialize radeon, disabling 
> > IOCTL
> > Nov  2 00:53:03 plutonium kernel: [  519.781298] radeon: probe of 
> > 0000:01:00.0 failed with error -22
> > Nov  2 00:53:43 plutonium kernel: [  560.657546] [drm] Module unloaded
>
> Make sure you have a new enough kernel.  You need 2.6.32 or Dave's
> drm-next tree for r6xx/r7xx KMS support.  Also, radeonhd doesn't
> support kms, you need to use radeon (xf86-video-ati) if you want to
> try kms.

OK, I'll try it on 2.6.32-rcX as well.
However, I tried the KMS on .31 only after reading reports on the phoronix 
forums that said it worked on .31 as well.
I admit I didn't expect the support to be fully functional - just wanted to 
check it out ;)

Thanks,
Kunal
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