Bug 11694

I've got an issue with the via drm module. I'm running ubuntu Linux with the xserver-xorg-video-via package. The 2D parts works ok, but when trying to run 3D applications, it fails.

I compiled the drm modules from drm cvs source and installed them over the kernel modules. When the via module is installed I get this:

[   48.930391] [drm] Initialized drm 1.1.0 20060810
[   48.945543] [drm] Initialized via 2.11.0 20061227 on minor 0
[   48.945907] ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 20
[   48.949321] [drm] Initialized via 2.11.0 20061227 on minor 1
[   48.962229] agpgart: Found an AGP 3.0 compliant device at 0000:00:00.0.
[   48.962611] agpgart: Xorg tried to set rate=x12. Setting to AGP3 x8 mode.
[   48.962921] agpgart: Putting AGP V3 device at 0000:00:00.0 into 8x mode
[   48.963266] agpgart: Putting AGP V3 device at 0000:01:00.0 into 8x mode
[   48.967489] [drm:via_mem_alloc] *ERROR* Attempt to allocate from uninitialized memory manager.

Then - when I try to run a small Programm, which uses the glx Extension (read: glxgears), the programm segfaults and I get this:

[   87.696000] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000004
[   87.696000]  printing eip:
[   87.696000] c012e00a
[   87.696000] *pde = 00000000
[   87.696000] Oops: 0002 [#1]
[   87.696000] Modules linked in: via drm binfmt_misc nfs nfsd exportfs lockd sunrpc ppdev powernow_k8 cpufreq_powersave cpufreq_conservative cpufreq_ondemand cpufreq_stats freq_table cpufreq_userspace sony_acpi dev_acpi tc1100_wmi pcc_acpi ac battery button video container sbs i2c_ec dock asus_acpi backlight hwmon_vid eeprom i2c_isa skge i2c_dev sr_mod sbp2 ieee1394 lp snd_via82xx gameport snd_ac97_codec ac97_bus snd_mpu401_uart snd_pcm_oss snd_pcm snd_page_alloc snd_mixer_oss snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device snd pcspkr parport_pc parport rtc psmouse soundcore usb_storage libusual shpchp serio_raw i2c_viapro k8temp i2c_core pci_hotplug amd64_agp agpgart tsdev evdev ipv6 ext3 jbd mbcache sg sd_mod ide_cd cdrom sata_via ata_generic libata scsi_mod floppy generic via_rhine mii ehci_hcd uhci_hcd usbcore via82cxxx raid10 raid456 xor raid1 raid0 multipath linear md_mod thermal processor fan dm_mod fbcon tileblit font bitblit softcursor vesafb capability commoncap
[   87.696000] CPU:    0
[   87.696000] EIP:    0060:[<c012e00a>]    Not tainted VLI
[   87.696000] EFLAGS: 00210046   (2.6.20-16-386 #2)
[   87.696000] EIP is at add_wait_queue+0x2a/0x50
[   87.696000] eax: 00200246   ebx: 00000000   ecx: ea0d1ed4   edx: ea0d1ec8
[   87.696000] esi: f621a400   edi: f621a580   ebp: ea0d1f0c   esp: ea0d1ea8
[   87.696000] ds: 007b   es: 007b   ss: 0068
[   87.696000] Process glxgears (pid: 5994, ti=ea0d0000 task=ee07c030 task.ti=ea0d0000)
[   87.696000] Stack: f46d0000 f621a400 ffff339a f8e0a8e7 00000040 ea0d1edc c03a4540 f621a580 
[   87.696000]        00000000 ee07c030 c01186a0 00000000 00000000 00000000 00000000 f621a400 
[   87.696000]        eae46480 f8e1c4a2 ea140200 00000000 00000000 00000000 00000000 ee07c030 
[   87.696000] Call Trace:
[   87.696000]  [<f8e0a8e7>] via_driver_vblank_wait+0x97/0x160 [via]
[   87.696000]  [<c01186a0>] default_wake_function+0x0/0x10
[   87.696000]  [<f8e1c4a2>] drm_wait_vblank+0x212/0x2d0 [drm]
[   87.696000]  [<c012ded0>] autoremove_wake_function+0x0/0x50
[   87.696000]  [<f8e1c290>] drm_wait_vblank+0x0/0x2d0 [drm]
[   87.696000]  [<f8e1a9ee>] drm_ioctl+0xae/0x210 [drm]
[   87.696000]  [<c010209a>] __switch_to+0xaa/0x1d0
[   87.696000]  [<c01156a0>] native_write_cr0+0x0/0x10
[   87.696000]  [<c010643a>] sync_cmos_clock+0x12a/0x140
[   87.696000]  [<f8e1a940>] drm_ioctl+0x0/0x210 [drm]
[   87.696000]  [<c016e339>] do_ioctl+0x69/0x70
[   87.696000]  [<c016e39c>] vfs_ioctl+0x5c/0x270
[   87.696000]  [<c016e622>] sys_ioctl+0x72/0x90
[   87.696000]  [<c0102fc0>] sysenter_past_esp+0x69/0xa9
[   87.696000]  [<c010643a>] sync_cmos_clock+0x12a/0x140
[   87.696000]  =======================
[   87.696000] Code: 90 83 ec 0c 89 7c 24 08 89 c7 89 1c 24 89 74 24 04 83 22 fe 9c 58 fa 66 66 66 90 66 66 66 90 66 66 66 90 66 66 90 8b 1f 8d 4a 0c <89> 4b 04 89 5a 0c 89 79 04 89 0f 50 9d 66 66 66 90 66 66 66 90 
[   87.696000] EIP: [<c012e00a>] add_wait_queue+0x2a/0x50 SS:ESP 0068:ea0d1ea8
[   87.696000]  <3>[drm:drm_release] *ERROR* Device busy: 1 0