xorg Resolution is incorrect

[Vladimir Janowski]

I have an ASUS K50C with display 1366 x 768 chipset SiS 672+968. But in the settings screen you can set the maximum resolution 1024 x 768 (4:3).

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: xorg 1:7.7+1ubuntu3
ProcVersionSignature: Ubuntu 3.5.0-15.23-generic 3.5.4
Uname: Linux 3.5.0-15-generic i686
.tmp.unity.support.test.1:

ApportVersion: 2.5.2-0ubuntu4
Architecture: i386
CasperVersion: 1.324
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
Date: Wed Oct 10 13:54:54 2012
DistUpgraded: Fresh install
DistroCodename: quantal
DistroVariant: ubuntu
GraphicsCard:
 Silicon Integrated Systems [SiS] 771/671 PCIE VGA Display Adapter [1039:6351] (rev 10) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. Device [1043:19e2]
LiveMediaBuild: Ubuntu 12.10 "Quantal Quetzal" - Beta i386 (20120926)
MachineType: ASUSTeK Computer Inc. K50C
ProcEnviron:
 PATH=(custom, no user)
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash -- maybe-ubiquity
SourcePackage: xorg
Symptom: display
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/06/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 209
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: K50C
dmi.board.vendor: ASUS CORPORATION
dmi.board.version: 1.0
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer Inc.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr209:bd01/06/2010:svnASUSTeKComputerInc.:pnK50C:pvr1.0:rvnASUSCORPORATION:rnK50C:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr:
dmi.product.name: K50C
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK Computer Inc.
version.compiz: compiz 1:0.9.8.2+bzr3377-0ubuntu1
version.libdrm2: libdrm2 2.4.39-0ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 9.0~git20120917.7cfd42ce-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 9.0~git20120917.7cfd42ce-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.13.0-0ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.3-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.99.99~git20120913.8637f772-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.20.8-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.2-0ubuntu1