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Bug#603455: release-notes: X notes for squeeze



Package: release-notes
Severity: normal
Tags: squeeze

Hi,

the following are a few X-related items I think should be mentioned in
the release notes.  Hopefully I didn't forget anything important.  CC:ed
to debian-x@.

The cyrix, imstt, nsc, sunbw2, vga and via X video drivers have been
discontinued upstream, and thus removed.  If you use them, you'll need
to switch to a generic driver, or to openchrome instead of via (the
latter should happen automatically on upgrade).

The nv and radeonhd X drivers are obsolete.  They are still provided in
this release, but you should consider using the nouveau and radeon
drivers instead.

Graphics mode setting code has moved from the Xorg driver to the kernel
for Intel chipsets (starting with i830), for ATI/AMD Radeon chips (from
the original Radeon to the Radeon HD 5xxx ``Evergreen'' series) and for
NVIDIA chipsets (using the ``nouveau'' driver).  This switch to kernel
mode setting (KMS) has a number of advantages, but is incompatible with
the old style Xorg drivers.  In particular, users of the ``nv'',
``nvidia'' and ``radeonhd'' Xorg drivers will need to either switch to
``nouveau'' and ``radeon'', or disable the KMS driver.  See
http://wiki.debian.org/KernelModesetting

Support for old-style userspace mode setting is discontinued in the
``intel'' driver in squeeze, which requires a recent Linux kernel with
the CONFIG_I915_KMS option enabled, or the official Debian squeeze
kernel.

In order to support hotplugging of input devices, the Xorg X server now
uses the evdev driver for most input devices.  This requires enabling
the CONFIG_INPUT_EVDEV option in the Linux kernel configuration.  This
driver also uses different keycodes from the old kbd driver, so users of
programs like xmodmap or xbindkeys might need to review their settings.

Cheers,
Julien

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