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    SubjectRe: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness with hotkeys (BISECTED)
    On 04/15/2009 03:50 AM, Zhang Rui wrote:
    > On Wed, 2009-04-15 at 07:59 +0800, Niel Lambrechts wrote:
    >
    >> On 04/13/2009 10:34 PM, Henrique de Moraes Holschuh wrote:
    >>
    >>> On Mon, 13 Apr 2009, Niel Lambrechts wrote:
    >>>
    >>>
    >>>>>> In 2.6.29.1:
    >>>>>> lrwxrwxrwx 1 root root 0 Apr 12 20:01 /sys/class/backlight/acpi_video0
    >>>>>> -> ../../devices/virtual/backlight/acpi_video0
    >>>>>>
    >>>>>>
    >>> Well, that at least confirms that thinkpad-acpi doesn't have anything to
    >>> do with your troubles, you were using acpi video.
    >>>
    >>>
    >> Okay, I've bisected it to:
    >>
    >> 74a365b3f354fafc537efa5867deb7a9fadbfe27 is first bad commit
    >> commit 74a365b3f354fafc537efa5867deb7a9fadbfe27
    >> Author: Matthew Garrett <mjg59@srcf.ucam.org>
    >> Date: Thu Mar 19 21:35:39 2009 +0000
    >>
    >> ACPI: Populate DIDL before registering ACPI video device on Intel
    >>
    >>
    >
    > please set CONFIG_DRM_I915_KMS, reload the ACPI video driver after
    > loading i915 and see if it helps.
    >
    In all the kernels I've tried (up to 2.6.30-rc2), I get issues with KMS:

    I boot with 'modeset=1 i915=1', console login is okay and 'modprobe i915
    modeset=1' seems to work - the console resolution changes (very small
    1920x1200).

    When I do 'init 5' kdm loads (and display the logon screen) but after
    entering my username/password it hangs at the KDE splash-screen (the
    last icon, so some progress must have been made). Caps lock then won't
    even work, but emergency sync seemed to do the trick.

    /var/log/warnings:
    Apr 15 07:55:11 linux-7vph nm-dispatcher.action: Script
    '/etc/NetworkManager/dispatcher.d/autofs' exited with error status 1.
    Apr 15 07:55:12 linux-7vph kernel: allocated 1920x1200 fb: 0x02020000,
    bo f598acc0
    Apr 15 07:55:12 linux-7vph kernel: Console: switching to colour frame
    buffer device 240x75
    Apr 15 07:55:13 linux-7vph nm-dispatcher.action: Script
    '/etc/NetworkManager/dispatcher.d/nfs' exitedwith error status 6.
    Apr 15 07:55:19 linux-7vph kdm_config[3234]: Multiple occurrences of key
    'UseTheme' in section [X-*-Greeter] of /usr/share/kde4/config/kdm/kdmrc
    Apr 15 07:55:22 linux-7vph kernel: CE: hpet increasing min_delta_ns to
    15000 nsec
    Apr 15 07:56:10 linux-7vph kernel: Emergency Sync complete
    Apr 15 07:56:26 linux-7vph kernel: CE: hpet increasing min_delta_ns to
    22500 nsec
    Apr 15 07:56:27 linux-7vph kernel: Emergency Sync complete
    Apr 15 07:56:49 linux-7vph kernel: Emergency Sync complete
    Apr 15 07:56:55 linux-7vph kernel: CE: hpet increasing min_delta_ns to
    33750 nsec
    Apr 15 07:56:56 linux-7vph kernel: Emergency Sync complete

    So while I'd love to use KMS, I have never been able to get X up using it.

    Regards,
    Niel




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