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nightfrost

Member

From: Sweden

Registered: 2005-04-16

Posts: 647

How much memory is allocated for i810?

My xorg log says this:

cat /var/log/Xorg.0.log | grep -i videoram

(II) I810(0): Will attempt to tell the BIOS that there is 12288 kB VideoRAM
(II) I810(0): BIOS now sees 12288 kB VideoRAM
(--) I810(0): Pre-allocated VideoRAM: 8060 kByte
(**) I810(0): VideoRAM: 65536 kByte

Does it mean I have 12M, 8M, or 64M of memory allocated for the videocard?

This is what I have in the device section of xorg.conf

Section "Device"
        Identifier  "Videocard_Device"
        Driver      "i810"
        Screen 0
        Option "XAANoOffscreenPixmaps"
        Option "dri"
        VideoRam        65536
EndSection

It seems to me like it allocates 12M. How do I make it allocate 64M?

lanrat

Member

From: Poland

Registered: 2003-10-28

Posts: 1,274

Re: How much memory is allocated for i810?

I think you already did. 12 MB is what the driver can see by default. 8 MB is preallocated by default and you force it to use custom value = 64 MB. Everything seems ok to me.
According to i810 docs:

The Intel 8xx family of integrated graphics chipsets has a unified memory architecture and uses system memory for video ram. For the i810 and i815 family of chipset, operating system support for allocating system memory for video use is required in order to use this driver. For the 830M and later, this is required in order for the driver to use more video ram than has been pre-allocated at boot time by the BIOS. This is usually achieved with an "agpgart" or "agp" kernel driver.
[...]
By default 8 Megabytes of system memory are used for graphics. For the 830M and later, the default is 8 Megabytes when DRI is not enabled and 32 Megabytes with DRI is enabled. This amount may be changed with the VideoRam entry in the config file Device section. It may be set to any reasonable value up to 64MB for older chipsets or 128MB for newer chipets. It is advisable to check the Xorg log file to check if any features have been disabled because of insufficient video memory. In particular, DRI support or tiling mode may be disabled with insufficient video memory. Either of these being disabled will reduce performance for 3D applications. Note however, that increasing this value too much will reduce the amount of system memory available for other applications.

nightfrost

Member

From: Sweden

Registered: 2005-04-16

Posts: 647

Re: How much memory is allocated for i810?

Alright, thanks alot!

I just get paranoid sometimes