Public bug reported:

Ubuntu 13.10
Acer 5920G with modded BIOS 5920G_MXM_V3.WPH and 9600M GT DDRII

01:00.0 VGA compatible controller: NVIDIA Corporation G96M [GeForce 9600M GT] 
(rev a1)
---

I'been using Ubuntu for some years on this laptops without major problems.
 
After fixing/baking defective 8600m gt three times decided to change it for a 
9600m gt,
 
Flahsed bios with modded one.
Started Ubuntu, Works fine.
Changed to 9600m GT - desktop stops working in several ways after some minutes 
(1 to 5 maybe):
-black screen
-mouse and keyboard works but desktop doesn't, no reaction from icons, menus.  
¿Unity?
-...

If I change from one privative version to another the result goes from same 
problem to no way to problems at startup, display detection problems and not 
working at all --> re-install ubuntu.
 
Changed from privative NVIDIA driver (tested several of the avalable ones in 
Aditional drives tab) to noveau and problem is gone.  I would prefer to use the 
privative one if posible.
 
I've changed back and forward from privative to noveau several times with same 
effect.
 
I've never had that problem with the 8600m gt.
 
I've read it could be a bios problem, a unity problem, a nvidia driver 
problem... but no solution.
 
OT.Windows works fine, GPU temp arround 50ºC.

Thanks.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: xorg 1:7.7+1ubuntu6
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic x86_64
.tmp.unity.support.test.0:
 
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CompizPlugins: No value set for 
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
Date: Sun Mar 30 12:15:58 2014
DistUpgraded: Fresh install
DistroCodename: saucy
DistroVariant: ubuntu
GraphicsCard:
 NVIDIA Corporation G96M [GeForce 9600M GT] [10de:0649] (rev a1) (prog-if 00 
[VGA controller])
   Subsystem: Acer Incorporated [ALI] Device [1025:0121]
InstallationDate: Installed on 2014-03-30 (0 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: Acer, inc. Aspire 5920G
MarkForUpload: True
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-12-generic 
root=UUID=50362a91-a55d-48ea-95eb-b09b324547e0 ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/18/2008
dmi.bios.vendor: Acer
dmi.bios.version: v1.3813
dmi.board.name: Chapala
dmi.board.vendor: Acer, Inc.
dmi.board.version: Not Applicable
dmi.chassis.type: 1
dmi.chassis.vendor: Acer, Inc.
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnAcer:bvrv1.3813:bd06/18/2008:svnAcer,inc.:pnAspire5920G:pvrNotApplicable:rvnAcer,Inc.:rnChapala:rvrNotApplicable:cvnAcer,Inc.:ct1:cvrN/A:
dmi.product.name: Aspire 5920G
dmi.product.version: Not Applicable
dmi.sys.vendor: Acer, inc.
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.46-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.2.1-1ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.2.1-1ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.14.3-3ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.2.0-0ubuntu10
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.904-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.9-2ubuntu1
xserver.bootTime: Sun Mar 30 11:35:08 2014
xserver.configfile: default
xserver.errors:
 Failed to load module "nvidia" (module does not exist, 0)
 Failed to load module "nvidia" (module does not exist, 0)
xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.14.3-3ubuntu2
xserver.video_driver: nouveau

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 saucy ubuntu

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which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1299723

Title:
  Desktop stops working with propietary NVIDIA drivers.

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