Trident 9660 problem

Trident 9660 problem

[Tomas Franke]

Hi

I have following problem:
I have an old Olivetti computer as the router. After I upgraded it to 2.4.2
kernel (RedHat 7.1), the screen always blanks in the moment when it starts to
write the boot messages. The screen is completely black and no signal on
Hsync/Vsync on VGA conncetor. So the monitor goes to the sleep mode after a
while.
But the rest of the computer works as usual during this problem. Only the video
output is disabled.
I tried several vga= options but with the same result. The video chip is
reported as "Trident 9660" by both X Windows and M$ Windoze.

Is this problem known?


Tomas

Re: Trident 9660 problem

[Andries.Brouwer]

Tomas Franke writes:

: I have following problem: 
: I have an old Olivetti computer as the router. After I upgraded it to 2.4.2 
: kernel (RedHat 7.1), the screen always blanks in the moment when it starts
: to write the boot messages. The screen is completely black and no signal on 
: Hsync/Vsync on VGA conncetor. So the monitor goes to the sleep mode after a 
: while. But the rest of the computer works as usual during this problem.
: Only the video output is disabled. 
: The video chip is reported as "Trident 9660" by both X Windows and
: M$ Windoze.
:
: Is this problem known? 

Yes. It is the kernel writing to port 0x92 to enable the A20 gate.
Find a kernel that doesnt or edit setup.S.

See also
	http://www.win.tue.nl/~aeb/linux/kbd/A20.html

Andries