Hi suhaimi_sj (and all the others),
I also have this Compal notebook (I guess it is a CY27, because this appears in the "drivers CD"), and I have the same problem!!!!!

. I canīt say exactly the model, because the brazilian company the resells the notebook removed all the original identifying tags. It is a Celeron 2.2GHz, with a "Intel Corp. 82852/855GM Integrated Graphics Device". Here is the full lspci output:
[root@mynote root]# lspci
00:00.0 Host bridge: Intel Corp. 82852/855GM Host Bridge (rev 02)
00:00.1 System peripheral: Intel Corp. 855GM/GME GMCH Memory I/O Control Registers (rev 02)
00:00.3 System peripheral: Intel Corp. 855GM/GME GMCH Configuration Process Registers (rev 02)
00:02.0 VGA compatible controller: Intel Corp. 82852/855GM Integrated Graphics Device (rev 02)
00:02.1 Display controller: Intel Corp. 82852/855GM Integrated Graphics Device (rev 02)
00:1d.0 USB Controller: Intel Corp. 82801DB (ICH4) USB UHCI #1 (rev 03)
00:1d.1 USB Controller: Intel Corp. 82801DB (ICH4) USB UHCI #2 (rev 03)
00:1d.2 USB Controller: Intel Corp. 82801DB (ICH4) USB UHCI #3 (rev 03)
00:1d.7 USB Controller: Intel Corp. 82801DB (ICH4) USB2 EHCI Controller (rev 03)00:1e.0 PCI bridge: Intel Corp. 82801BAM/CAM PCI Bridge (rev 83)
00:1f.0 ISA bridge: Intel Corp. 82801DBM LPC Interface Controller (rev 03)
00:1f.1 IDE interface: Intel Corp. 82801DBM (ICH4) Ultra ATA Storage Controller (rev 03)
00:1f.3 SMBus: Intel Corp. 82801DB/DBM (ICH4) SMBus Controller (rev 03)
00:1f.5 Multimedia audio controller: Intel Corp. 82801DB (ICH4) AC'97 Audio Controller (rev 03)
00:1f.6 Modem: Intel Corp. 82801DB (ICH4) AC'97 Modem Controller (rev 03)
02:00.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host Controller (rev 80)
02:03.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
02:04.0 CardBus bridge: ENE Technology Inc CB1420 Cardbus Controller (rev 02)
02:04.1 CardBus bridge: ENE Technology Inc CB1420 Cardbus Controller (rev 02)
Have you succeded in getting 1024x768 to work? After searching on the net for days, I found out that it seems that some versions of the 855GM vbios do not have all modes listed in it

. For instance, in my notebook, Xorg claims that only the "800x600" and "640x480" modes are available. Probably, the Windows driver is able to bypass the vbios.
I have tried everything: Intel drivers, Xfree86 4.4.0, changing modelines, forcing modes, enable/disable DRI/Dual head, last version of kernel, etc., etc., and combinations! Nothing works! I also tried some utilities that I found on the net, that are supposed to replace a given mode by another:
http://www.chzsoft.com.ar/855patch.html
http://perso.wanadoo.fr/apoirier/
They did not work for me, but maybe they will work for you.
Anyway, the best solution appears to be a BIOS update, to include the 1024x768 mode in vbios. The upgraded Vbios is available at Intel:
http://support.intel.com/support/gra.../CS-010512.htm
but, the producer of the notebook (Compal!) has to ship a BIOS update with the new vbios in it.
Did you get your notebook from Compal? Can you contact Compal?
Can someone contact Compal?
The BIOS setup utility says that the Bios is version "Phoenix Bios1.04".
Cheers,
Sergio