Re: PROBLEM: 2.6.29.2 - AGP doesn't work anymore on my nforce2

[Karsten Mehrhoff <kawime@gmx.de>]

On Mon, 04 May 2009 17:07:40 +0200, Michel Dänzer wrote:
> On Mon, 2009-05-04 at 08:31 +0200, Karsten Mehrhoff wrote:
>> On Mon, 04 May 2009 03:41:51 +0200, Shaohua Li wrote:
>>> On Fri, May 01, 2009 at 09:22:19PM +0800, kawime@gmx.de wrote:
>>>>> On Thu, 2009-04-30 at 17:59 -0700, Andrew Morton wrote:
>>>>>> On Thu, 30 Apr 2009 10:51:47 +0200
>>>>>> Karsten Mehrhoff wrote:
>>>>>>
>>>>>>> [1.]
>>>>>>> PROBLEM: No more agp card functionality with the patch 2.6.29.2 of
>>>>>> 'a/drivers/char/agp/generic.c'
>>>>>>>
>>>>>>> [2.]
>>>>>>> I compiled the kernel 2.6.29.2 with my .config of 2.6.29.1 and run
>>>>>> into problems with the speed of my ATI RADEON 9600 (rv350)
>>>>>>>
>>>>>>
>>>>>
>>>>> Is your problem speed issue ? ie just a slowdown ? Or does AGP stop
>>>>> working with this patch ? Slowdown is expected from this patch but
>>>>> it should hurt too much.
>>>>>
>>>>
>>>>                        2.6.29.1  | 2.6.29.2
>>>>                         --------  |  --------
>>>> glxgears             ~ 2900 FPS  |  ~ 75 FPS
>>>> glxgears -fullscreen ~  500 FPS  |  ~ 11 FPS
>>> Does this patch alone give so huge slowdown? From my little knowledge,
>>> xserver
>>> does agp pages allocation only at startup.
>>
>> I only reverted this patch in the source file  
>> (/drivers/char/agp/generic.c) and got back my old speed on 2.6.29.2.
>
> Is the DRI enabled in both cases? Compare the Xorg.0.log file and the
> output of
>
> dmesg|grep -e agp -e drm
>


*********************************
2.6.29.2 (original) 
*********************************

$ dmesg|grep -e agp -e drm
$ dmesg|grep agp
[    0.861997] Linux agpgart interface v0.103
[   10.893793] agpgart: Detected NVIDIA nForce2 chipset
[   10.939070] agpgart-nvidia 0000:00:00.0: AGP aperture is 64M @ 0xe0000000


$ glxinfo | grep direct
direct rendering: Yes


$ grep -i dri /var/log/Xorg.0.log
	X.Org Video Driver: 5.0
	X.Org XInput driver : 4.0
(II) LoadModule: "dri"
(II) Loading /usr/lib/xorg/modules/extensions//libdri.so
(II) Module dri: vendor="X.Org Foundation"
(II) Loading extension XFree86-DRI
(II) LoadModule: "dri2"
(II) Loading /usr/lib/xorg/modules/extensions//libdri2.so
(II) Module dri2: vendor="X.Org Foundation"
(II) Loading extension DRI2
(II) Scanning /usr/share/xserver-xorg/pci directory for additional PCI ID's supported by the drivers
(==) Matched radeon for the autoconfigured driver
(==) Assigned the driver to the xf86ConfigLayout
(II) Loading /usr/lib/xorg/modules/drivers//radeon_drv.so
	Module class: X.Org Video Driver
	ABI class: X.Org Video Driver, version 5.0
(II) RADEON: Driver for ATI Radeon chipsets:
	ABI class: X.Org Video Driver, version 5.0
	ABI class: X.Org Video Driver, version 5.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
(II) RADEON(0): [dri] Found DRI library version 1.3.0 and kernel module version 1.29.0
	ABI class: X.Org Video Driver, version 5.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
(EE) RADEON(0): [agp] AGP failed to initialize. Disabling the DRI.
	ABI class: X.Org Video Driver, version 5.0
(II) AIGLX: Screen 0 is not DRI2 capable
(II) AIGLX: Screen 0 is not DRI capable
(II) AIGLX: Loaded and initialized /usr/lib/dri/swrast_dri.so
(II) GLX: Initialized DRISWRAST GL provider for screen 0
	Module class: X.Org XInput Driver
	ABI class: X.Org XInput driver, version 4.0



**********************************
2.6.29.2 (with the reverted patch)
**********************************

$ dmesg|grep -e agp -e drm
[    0.870790] Linux agpgart interface v0.103
[    0.871479] agpgart: Detected NVIDIA nForce2 chipset
[    0.877279] agpgart-nvidia 0000:00:00.0: AGP aperture is 64M @ 0xe0000000
[    0.878450] [drm] Initialized drm 1.1.0 20060810
[    0.881925] [drm] Initialized radeon 1.29.0 20080528 on minor 0
[   33.336636] agpgart-nvidia 0000:00:00.0: AGP 3.0 bridge
[   33.336658] agpgart-nvidia 0000:00:00.0: putting AGP V3 device into 8x mode
[   33.575910] [drm] Setting GART location based on new memory map
[   33.575922] [drm] Loading R300 Microcode
[   33.575965] [drm] Num pipes: 1
[   33.575973] [drm] writeback test succeeded in 1 usecs


$ glxinfo | grep direct
direct rendering: Yes


$ grep -i dri /var/log/Xorg.0.log
	X.Org Video Driver: 5.0
	X.Org XInput driver : 4.0
(II) LoadModule: "dri"
(II) Loading /usr/lib/xorg/modules/extensions//libdri.so
(II) Module dri: vendor="X.Org Foundation"
(II) Loading extension XFree86-DRI
(II) LoadModule: "dri2"
(II) Loading /usr/lib/xorg/modules/extensions//libdri2.so
(II) Module dri2: vendor="X.Org Foundation"
(II) Loading extension DRI2
(II) Scanning /usr/share/xserver-xorg/pci directory for additional PCI ID's supported by the drivers
(==) Matched radeon for the autoconfigured driver
(==) Assigned the driver to the xf86ConfigLayout
(II) Loading /usr/lib/xorg/modules/drivers//radeon_drv.so
	Module class: X.Org Video Driver
	ABI class: X.Org Video Driver, version 5.0
(II) RADEON: Driver for ATI Radeon chipsets:
	ABI class: X.Org Video Driver, version 5.0
	ABI class: X.Org Video Driver, version 5.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
(II) RADEON(0): [dri] Found DRI library version 1.3.0 and kernel module version 1.29.0
	ABI class: X.Org Video Driver, version 5.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
(II) RADEON(0): [dri] Visual configs initialized
(II) RADEON(0): [DRI] installation complete
(WW) RADEON(0): DRI init changed memory map, adjusting ...
	ABI class: X.Org Video Driver, version 5.0
(II) AIGLX: Screen 0 is not DRI2 capable
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: node name is /dev/dri/card0
(II) AIGLX: enabled GLX_texture_from_pixmap with driver support
(II) AIGLX: Loaded and initialized /usr/lib/dri/r300_dri.so
(II) GLX: Initialized DRI GL provider for screen 0
	Module class: X.Org XInput Driver
	ABI class: X.Org XInput driver, version 4.0


For me it seems that agp failed to initialize because of the patch.