Bug#275756: Agpgart fails to detect VIA PT880 chipset (PCI_ID defined incorrectly?)
Hi Charles,
thanks for your bug report. I have CCed the maintainer of the
agpgart driver for his comment.
On Sat, Oct 09, 2004 at 09:25:33PM -0400, Charles C Bailey wrote:
> Package: kernel-source-2.6.8
> Version: 2.6.8-7
> Severity: normal
>
> I am using an ABIT VT7 main board with VIA PT880 agp controller and
> Nvidia geForce5700LE. agpgart did not recognize said controlled when
> modprobed (i. e. didn't print any messages to dmesg excpet 'Linux
> agpgart interface v0.100 (c) Dave Jones'), and nvidia's proprietary
> driver reported (cat /proc/driver/nvidia/agp/status) agp status as
> disabled. By editing some lines in the kernel source I was able to get
> agpgart to see my chipset. Whether this was the 'right' way to do it or
> not I have no idea. I'll go through the process I followed below.
>
> An lspci showed the following devices (note what comes first- usually
> the agp controler; in this case it is reporting an ID of 0x0258):
>
> 0000:00:00.0 Host bridge: VIA Technologies, Inc.: Unknown device 0258
> 0000:00:00.1 Host bridge: VIA Technologies, Inc.: Unknown device 1258
> 0000:00:00.2 Host bridge: VIA Technologies, Inc.: Unknown device 2258
> 0000:00:00.3 Host bridge: VIA Technologies, Inc.: Unknown device 3258
> 0000:00:00.4 Host bridge: VIA Technologies, Inc.: Unknown device 4258
> 0000:00:00.7 Host bridge: VIA Technologies, Inc.: Unknown device 7258
> 0000:00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
> 0000:00:0a.0 Network controller: Intersil Corporation Intersil ISL3890
> [Prism GT/Prism Duette] (rev 01)
> 0000:00:0c.0 USB Controller: NEC Corporation USB (rev 41)
> 0000:00:0c.1 USB Controller: NEC Corporation USB (rev 41)
> 0000:00:0c.2 USB Controller: NEC Corporation USB 2.0 (rev 02)
> 0000:00:0f.0 RAID bus controller: VIA Technologies, Inc. VIA VT6420 SATA
> RAID Controller (rev 80)
> 0000:00:0f.1 IDE interface: VIA Technologies, Inc.
> VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
> 0000:00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
> 1.1 Controller (rev 81)
> 0000:00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
> 1.1 Controller (rev 81)
> 0000:00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
> 1.1 Controller (rev 81)
> 0000:00:10.3 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB
> 1.1 Controller (rev 81)
> 0000:00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
> 0000:00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
> [K8T800 South]0000:00:11.5 Multimedia audio controller: VIA
> Technologies, Inc.
> VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
>
> 0000:00:12.0 Ethernet controller: VIA Technologies, Inc. VT6102
> [Rhine-II] (rev 78)
> 0000:01:00.0 VGA compatible controller: nVidia Corporation: Unknown
> device 0343 (rev a1)
>
> In the kernel-2.6.8 source tree in include/linux/pci_ids.h, the
> following two relevant IDS are defined:
> #define PCI_DEVICE_ID_NVIDIA_QUADRO4_900XGL 0x0258
> #define PCI_DEVICE_ID_VIA_PT880 0x3258
>
> Since I assumed I did not have an Nvidia Quadro4900XGL (whatever that
> is) for an AGP controller I modified the two lines as follows:
> #define PCI_DEVICE_ID_NVIDIA_QUADRO4_900XGL 0x0000 (just to get rid
> of it and let modules I'm not using still compile)
> #define PCI_DEVICE_ID_VIA_PT880 0x0258 (to match my lspci)
>
> I then make-kpkg'd a kernel-image out of this and now get the following
> lines from agpgart in dmesg:
> agpgart: Detected VIA PT880 chipset
> agpgart: Maximum main memory to use for agp memory: 941M
> agpgart: AGP aperture is 128M @ 0xe0000000
> agpgart: Found an AGP 3.5 compliant device at 0000:00:00.0.
> agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
> agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
>
> nvidia's driver concurs and shows agp enabled.
>
> It may be that I just have an odd motherboard but this really smelled
> like a bug so hopefully someone will know what to do with it. Let me
> know if you need any other /more detailed info.
>
> Thanks for your time,
> Charles
> charles.bailey@tufts.edu
>
> -- System Information:
> Debian Release: 3.1
> APT prefers testing
> APT policy: (990, 'testing'), (500, 'unstable')
> Architecture: i386 (i686)
> Kernel: Linux 2.6.8
> Locale: LANG=C, LC_CTYPE=C
>
> Versions of packages kernel-source-2.6.8 depends on:
> ii binutils 2.15-4 The GNU assembler, linker
> and bina
> ii bzip2 1.0.2-1 A high-quality
> block-sorting file
> ii coreutils [fileutils] 5.2.1-2 The GNU core utilities
>
> -- no debconf information
>
>
>
>
> --
> To UNSUBSCRIBE, email to debian-kernel-REQUEST@lists.debian.org
> with a subject of "unsubscribe". Trouble? Contact listmaster@lists.debian.org
--
Horms
Reply to: