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Old 04-22-2002, 08:35 PM   #1
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Registered: Apr 2002
Distribution: Redhat 7.2
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Redhat 7.2 video troubles

I recently got myself a new box and have been trying to get Redhat 7.2 onto it to no avail. The problem seems, as near as I can tell, centered on the monitor. Basically what happens is when I install Redhat, it is unable to detect my monitor by autoprobe, despite that fact that it detects it perfectly by autoprobe on my other box and I'm using the same install disks.

Anyway, the video card on my problem machine is a SiS 630 (which it detects just fine) and when I get to the portion of the installation where I can test my Xserver settings, I hit test and everything appears just fine. But when I hit the "Yes I can see this correctly button" (or whatever it exactly says) or wait for that dialog to timeout, the screen flashes, then stays in X. I can't get back and finish the install! I have tried running through the install and not testing, but then it just goes black screen on me trying to get the graphical login screen.

Anyway, anyone ever seen anything like this before? (the monitor is a Dell P991 if it makes any difference)
Old 04-23-2002, 12:36 PM   #2
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Registered: Mar 2002
Location: ct. usa
Distribution: RedHat 7.2
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Try setting the monitor to the same settings as on the other install by using custom settings.

good luck
Old 04-25-2002, 10:48 AM   #3
Registered: Mar 2002
Location: London
Distribution: Red Hat 9
Posts: 302

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the satanic SiS630 so called video card...

I have seen this problem time and time again from a lot of people with SiS cards. You will also have problems if you have a SiS630 modem. Anyway, while i am full of problems i don't have many solutions. Thomas Winischhofer does though and you can visit his site here. Sorry this is going to be more question than answer, but maybe you will find what you're after at that site.
Myself i am not too clued up and i do not understand all of Thomas' instructions. Can anybody help me with my own SiS 630 video card problem? I have installed mandrake 8.0 successfully but i am stuck now with Xconfigurator failing to write a working XF86Config file, and the dreaded "frozen screen where you can't even Ctrl-Alt-Backspace" whwnever i startx. Here is where i am at myself, has anybody sorted this problem themselves? :

from Thomas Winischhofer's site:
Variant 2: I want sisfb compiled as a module. I want to use X with a depth of 24 and with DRI.

Download the latest sisfb source code and decompress the archive to /usr/src/linux/drivers/video/sis/ (or whereever your kernel source tree is located).

Copy the file sisfb.h over the old one in /usr/src/linux/include/linux.

Configure the kernel to use the SiS framebuffer as a module; do only select SiS 300/630 support, not SiS 315 (unless your machine has a 315/550/650/740.

Apply the DRM kernel patch, choose the DRM module to be compiled as a module (not into the kernel) and re-compile the kernel. (The patch is not required as of 2.4.18-rc2.)

Before starting X, do insmod sisfb mode=none mem=12288 to start the framebuffer driver without changing the console mode.

Using mode:none is up to your preference; if you like a graphical console and sisfb works on your machine, specify a valid mode instead of mode=none, such as mode=1024x768x16.
Download the latest X driver and place it to /usr/X11R6/lib/modules/drivers/

Set up the X config file (in most cases /etc/X11/XF86Config-4) with a depth of 24 (DefaultDepth 24 in the Screen section) and specify Option "MaxXFBMem" "12288" in the Device section.

Set the video memory to at least 32MB in the BIOS.


That's it!
okay, i have the latest sisfb source code and i have decompressed them. I have copied sisfb.h over the old one in /usr/src/linux/include/linux.

Now how do i configure the kernel
to use the SiS framebuffer as a module? and how and where do i only select SiS 300/630 support?

I don't think i need the DRM module, since i am now running mandrake 8.0 and i think the kernel is recent enough, but i still would not know how to apply it if i did need to. Does this involve "make config"? if so, do you need to be in a certain directory for that to work?

Now, i am told to do insmod sisfb mode=none mem=12288 to start the framebuffer driver without changing the console mode, but is this necessary every time i want to startx? if so, where can i put it to make sure i don't need to type it on every boot?

Using mode:none is apparently up to my preference, but how should i know if i want to specify a valid mode instead of mode=none, such as mode=1024x768x16? will i see some picture improvement? by this stage in the instructions i am totally lost.

Now i haven't downloaded the latest X driver to /usr/X11R6/lib/modules/drivers/
and i haven't set up the X config file with a depth of 24 and Device, "MaxXFBMem" "12288" because i don't know how to do the steps before this. Nor have i set the video memory to at least 32MB in the BIOS, though i don't expect i will need to change the BIOS.

I should be able to easily do all those last things though, provided that the values given are correct, but it's just all that configuring and recompiling in the middle that foxes me. Can anybody help with this? I know it is possible, as i had it working before. A mate of mine got it working though, and I really need to be able to do it myself.
Thank you in advance to whomever can answer.....

Last edited by Calum; 04-25-2002 at 10:54 AM.


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