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[Diggory <diggory.hardy@xxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-nouveau

I'm using the following nouveau, explicitly enabled in xorg.conf.
ii  libdrm-nouveau1                            2.4.14-1ubuntu1                            Userspace interface to nouveau-specific kernel DRM services -- r
ii  nouveau-kernel-source                      0.0.15+git20090823-0ubuntu1                DKMS source for the nouveau kernel modules
ii  xserver-xorg-video-nouveau                 1:0.0.10~git+20090823+569a17a-0ubuntu1     X.Org X server -- Nouveau display driver (experimental)

It works and supports xrandr display hotplugging (currently running LVDS 1680x1050 and VGA  1280x1024, enabled as a separate screen after kde loads).
Once the display back-light has turned off (power-saving), it doesn't turn on again properly on the LVDS screen (VGA screen is fine but I'm not sure the power saving even works on this one). To turn the backlight back on I can VT-switch and return to X, or set the backlight brightness via the kde power-management applet. If I use the keyboard Fn+.. brightness shortcuts (might be hardware shortcuts; using a T61) the backlight gets turned off again (can still just-about see content on the screen).

I was previously using the nvidia closed-source driver which worked fine
(apart from lack of xrandr support...).

dmesg snippet, covering event:
---------------
[   21.654584] iwlagn 0000:03:00.0: firmware: requesting iwlwifi-4965-2.ucode
[   22.093205] usplash:401 freeing invalid memtype ffffffffd9000000-ffffffffd9e00000
[   22.220657] iwlagn 0000:03:00.0: loaded firmware version 228.61.2.24
[   22.436043] Registered led device: iwl-phy0::radio
[   22.436066] Registered led device: iwl-phy0::assoc
[   22.436083] Registered led device: iwl-phy0::RX
[   22.436099] Registered led device: iwl-phy0::TX
[   22.502128] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[   23.120996] e1000e: eth0 NIC Link is Up 100 Mbps Full Duplex, Flow Control: None
[   23.121000] 0000:00:19.0: eth0: 10/100 speed: disabling TSO
[   23.121458] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[   26.882951] [TTM] Zone  kernel: Available graphics memory: 1996878 kiB.
[   26.915241] mtrr: type mismatch for e0000000,10000000 old: write-back new: write-combining
[   26.915499] nouveau 0000:01:00.0: Allocating FIFO number 1
[   26.928959] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 1
[   28.741008] nouveau 0000:01:00.0: Allocating FIFO number 2
[   28.754074] nouveau 0000:01:00.0: nouveau_channel_alloc: initialised FIFO 2
[   33.830054] eth0: no IPv6 routers present
[   40.057791] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   40.057793] Bluetooth: BNEP filters: protocol multicast
[   40.063268] Bridge firewalling registered
[   40.386630] virbr0: starting userspace STP failed, starting kernel STP
[   41.178349] lo: Disabled Privacy Extensions
[ 4454.732544] __ratelimit: 6 callbacks suppressed
[ 4454.732547] ACPI: EC: missing confirmations, switch off interrupt mode.
[11117.493444] npviewer.bin[15207]: segfault at ff99cd48 ip 00000000ff99cd48 sp 00000000ffb9f4cc error 14
[12240.409638] npviewer.bin[15728]: segfault at ff99cd48 ip 00000000ff99cd48 sp 00000000ff9649ac error 14
---------------

** Affects: xserver-xorg-video-nouveau (Ubuntu)
     Importance: Undecided
         Status: New

-- 
LVDS backlight doesn''t turn on after going into powersaving mode (dual-monitor)
https://bugs.launchpad.net/bugs/474249
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