MTRR Problem with 2.6.18-4

MTRR Problem with 2.6.18-4

[Marco]

Hi everybody,

Laptop: Sony VAIO VGN-SZ3VP/X
Kernel: 2.6.18-4

I have the following problem with mtrr:

#cat /proc/mtrr
reg00: base=0x00000000 (?? 0MB), size=2048MB: write-back, count=1
reg01: base=0x7ff00000 (2047MB), size=?? 1MB: uncachable, count=1

#lspci -v
01:00.0 VGA compatible controller: nVidia Corporation GeForce Go 7400 (rev a1) (prog-if 00 [VGA])
 Subsystem: Sony Corporation Unknown device 81e6
 Flags: bus master, fast devsel, latency 0, IRQ 5
 Memory at dd000000 (32-bit, non-prefetchable) [size=16M]
 Memory at c0000000 (64-bit, prefetchable) [size=256M]
 Memory at dc000000 (64-bit, non-prefetchable) [size=16M]
 Capabilities: [60] Power Management version 2
 Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
 Capabilities: [78] Express Endpoint IRQ 0
 Capabilities: [100] Virtual Channel
 Capabilities: [128] Power Budgeting

Kernel boot option:
kernel /vmlinuz-2.6.18-4-686 root=/dev/sda3 ro video=vesafb:mtrr,ywrap vga=792 acpi_sleep=s3_bios elevator=cfq resume2=swap:/dev/sda2 

Can you help me to fix the "uncachable" reg?
Thanks

Marco


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Re: MTRR Problem with 2.6.18-4

[Marco]

Marco ha scritto:
> Hi everybody,
>
> Laptop: Sony VAIO VGN-SZ3VP/X
> Kernel: 2.6.18-4
>
> I have the following problem with mtrr:
>
> #cat /proc/mtrr
> reg00: base=0x00000000 (?? 0MB), size=2048MB: write-back, count=1
> reg01: base=0x7ff00000 (2047MB), size=?? 1MB: uncachable, count=1
>
> #lspci -v
> 01:00.0 VGA compatible controller: nVidia Corporation GeForce Go 7400 (rev a1) (prog-if 00 [VGA])
>  Subsystem: Sony Corporation Unknown device 81e6
>  Flags: bus master, fast devsel, latency 0, IRQ 5
>  Memory at dd000000 (32-bit, non-prefetchable) [size=16M]
>  Memory at c0000000 (64-bit, prefetchable) [size=256M]
>  Memory at dc000000 (64-bit, non-prefetchable) [size=16M]
>  Capabilities: [60] Power Management version 2
>  Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
>  Capabilities: [78] Express Endpoint IRQ 0
>  Capabilities: [100] Virtual Channel
>  Capabilities: [128] Power Budgeting
>
> Kernel boot option:
> kernel /vmlinuz-2.6.18-4-686 root=/dev/sda3 ro video=vesafb:mtrr,ywrap vga=792 acpi_sleep=s3_bios elevator=cfq resume2=swap:/dev/sda2 
>
> Can you help me to fix the "uncachable" reg?
> Thanks
>
> Marco
>   
Any idea? :'(
Regards

Marco

Re: MTRR Problem with 2.6.18-4

[Antonino A. Daplas]

On Mon, 2007-04-02 at 19:09 +0200, Marco wrote:
> Marco ha scritto:
> >   
> Any idea? :'(

Not sure why your /proc/mtrr output is like that, but if you want vesafb
to use mtrr, use:

video=vesafb:mtrr:3,ywrap... instead

(See Documentation/fb/vesafb.txt)

Tony