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Bug#409598: linux-image-2.6.18-4-amd64: 64bits kernel + 32bits userspace: DRI doesn't work

Package: linux-image-2.6.18-4-amd64
Version: 2.6.18.dfsg.1-10
Severity: normal


Hi,

when using the -amd64 kernel image with 32bits userspace, and launching
GL applications:
- the screen is garbled (the content of 3D windows is splattered all
  around the screen).
- the perf is rather weak (glxgears gives 2000fps, whereas in pure
  32bits it's 4000fps).

I'm using an R300, with free drivers from unstable/experimental, DRI is
enabled.

Thanks,
	Xav

-- System Information:
Debian Release: 4.0
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: i386 (x86_64)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-4-amd64
Locale: LANG=fr_FR.UTF-8@euro, LC_CTYPE=fr_FR.UTF-8@euro (charmap=UTF-8)

Versions of packages linux-image-2.6.18-4-amd64 depends on:
ii  coreutil 6.0-1                           The GNU core utilities
ii  debconf  1.5.11                          Debian configuration management sy
ii  e2fsprog 1.39+1.40-WIP-2006.11.14+dfsg-1 ext2 file system utilities and lib
ii  initramf 0.85e                           tools for generating an initramfs
ii  module-i 3.3-pre4-1                      tools for managing Linux kernel mo
ii  yaird [l 0.0.12-18                       Yet Another mkInitRD

linux-image-2.6.18-4-amd64 recommends no packages.

-- debconf information:
  linux-image-2.6.18-4-amd64/postinst/kimage-is-a-directory:
  linux-image-2.6.18-4-amd64/postinst/bootloader-test-error-2.6.18-4-amd64:
  linux-image-2.6.18-4-amd64/preinst/lilo-initrd-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/preinst/initrd-2.6.18-4-amd64:
  linux-image-2.6.18-4-amd64/preinst/failed-to-move-modules-2.6.18-4-amd64:
  linux-image-2.6.18-4-amd64/postinst/old-initrd-link-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/preinst/lilo-has-ramdisk:
  linux-image-2.6.18-4-amd64/postinst/old-dir-initrd-link-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/prerm/removing-running-kernel-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/preinst/already-running-this-2.6.18-4-amd64:
  linux-image-2.6.18-4-amd64/preinst/abort-install-2.6.18-4-amd64:
  shared/kernel-image/really-run-bootloader: true
  linux-image-2.6.18-4-amd64/preinst/abort-overwrite-2.6.18-4-amd64:
  linux-image-2.6.18-4-amd64/postinst/depmod-error-initrd-2.6.18-4-amd64: false
  linux-image-2.6.18-4-amd64/postinst/create-kimage-link-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/postinst/depmod-error-2.6.18-4-amd64: false
  linux-image-2.6.18-4-amd64/postinst/bootloader-error-2.6.18-4-amd64:
  linux-image-2.6.18-4-amd64/postinst/old-system-map-link-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/preinst/bootloader-initrd-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/preinst/overwriting-modules-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/preinst/elilo-initrd-2.6.18-4-amd64: true
  linux-image-2.6.18-4-amd64/prerm/would-invalidate-boot-loader-2.6.18-4-amd64: true
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