Re: External CRT works on 1024x768 but LCD not. Please Help!!!

Read my comments in blue. And I am still looking into this.

Nqnsome wrote:

> Hi,
>
> Can someone help me, please!?
>
> I have a Compal CY27 laptop. The graphics chipset is (as reported by lspci):
>
> 0000:00:02.0 VGA compatible controller: Intel Corp. 82852/855GM
> Integrated Graphics Device (rev 02)
> 0000:00:02.1 Display controller: Intel Corp. 82852/855GM Integrated
> Graphics Device (rev 02)
>

The 82852GM supports two independent display. You have one at 00:02:.0 and the other at 00:02.1. You are configured to use BusID  "PCI:0:2:0". I am not sure which video port 0:2:0 drivers. One thing you can try is change BusID  to "PCI:0:2:1".

>
> I read all material on the net about the memory/vbios problems with this
> chipset. I do not think I have this problem because I can change the
> memory allocated to the graphics card in the BIOS setup program, and the
> XFree output reflects these changes.
>
> I have tried all kinds of patchs, all the latest XFree versions
> available (including 4.4.0), several distros (FC1, FC2, Mandrake 10 and
> now, Debian unstable), the IBM driver, asked the dealer and manufacturer
> for a BIOS update, but my LCD never reaches 1024x768 (only 800x600 and
> 640x480). Actually, a few months ago, I gave out trying to make the LCD
> work under 1024x768, after all this dozens of failed trials.
>
> I am getting back to this because I just find out that, if I connect a
> external CRT monitor (actually a Samsung SyncMaster 700p) to the CRT out
> of my laptop, 1024x768 works on it! I am completely puzzled.

I suspect the reason it works is that your system have two graphics controller. And one of it is the 350Mhz 24-bit RAMDAC that support a regular scan analog monitor.

> If XFree
> can make the external monitor works on 1024x768, why it can not do the
> same with the LCD?

LCD and CRT don't use same code.

>
>
> I was told that my graphics chipset has a vbios problem that prevents
> Xfree from recognizing its ability to work under 1024x768, but, if this
> is true, why that external CRT works under 1024x768?
>
> I must note that under WinXP the LCD works on 1024x768 and that the XiG
> X server can also do the same.
>
> Now that it is clear that Xfree can produce 1024x768 with my chipset and
> my LCD supports 1024x768, how can I force Xfree to try 1024x768 on the LCD?
>
> My XF86Config-4 can be found here:
>
> http://paginas.terra.com.br/educacao/nqnsome/xf86config.txt
>
> The XFree output can be found here:
>
> http://paginas.terra.com.br/educacao/nqnsome/xfree_output.txt
>
> I am really sorry for my bad English.
>
> Thanks a lot for your assistance.
>
> Regards,
>
> Sergio
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