Mailing List Archive

>
> H.J. Lu wrote:
> >
> > Hi,
> >
> > I have a strange problem with cursor and mono MDA display under
> > Linux 2.1.131. For some reason, if I turn off the computer,
> > the cursor won't show up until I do a reboot.
>
> You were expecting the cursor to continue to blink after the power was
> shut off? Linux is good, but...
Ooops :-). I meant to say the cursor won't show up after
I power off my computer and then turn it on. A reboot fixes
it.
H.J.
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On Tue, 19 Jan 1999, H.J. Lu wrote:
> Hi,
>
> I have a strange problem with cursor and mono MDA display under
> Linux 2.1.131. For some reason, if I turn off the computer,
> the cursor won't show up until I do a reboot. It seems that
> something in shutdown/reboot sequence fixes the cursor on mono
> MDA card. BTW, I am running RedHat 5.2.
>
I've noticed similar effects on many recent kernels (including 2.2.0.....)
on a 386sx16 with an old Hercules clone video card. Sometimes I have a
cursor, sometimes I don't, and I haven't detected any patter re reboot
etc.. I suspect a timing problem, i.e. that the cursor may actually be
"there", just not visible, as often it is just weakly visible. Since the
only thing the machine is used for is checking to see if the latest
release can "make modules" as quickly as 2.0.36, I don't really care too
much. (So far 2.0.36 on my configuration wins by at least a factor of 3,
often 10. Obviously I have swapping problems.)
I might add that this machine hangs in the floating point check in bugs.h
if I don't comment out a bit, although I doubt if there is any relationship
between the two problems. (include/asm-i386/bugs.h line 81 as of
2.2.0pre8)
---
Bill Heagy mailto:wheagy@odyssey.on.ca
1006 - 1 Grosvenor Street http://www.odyssey.on.ca/~wheagy
London, Ontario N6A 1Y2 phone (519)663-9180
Canada
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Hi,
> Ooops :-). I meant to say the cursor won't show up after
> I power off my computer and then turn it on. A reboot fixes
> it.
Do you use vgacon or mdacon?
Have a nice fortnight
--
Martin `MJ' Mares <mj@ucw.cz> http://atrey.karlin.mff.cuni.cz/~mj/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
"The number of UNIX installations has grown to 10, with more expected. (6/72)"
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>
> Hi,
>
> > Ooops :-). I meant to say the cursor won't show up after
> > I power off my computer and then turn it on. A reboot fixes
> > it.
>
> Do you use vgacon or mdacon?
>
vgacon. How do I choose mdacon?
H.J.
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Hi,
> vgacon. How do I choose mdacon?
You can choose in kernel configuration, but mdacon works only for
MDA used as a secondary display.
Anyway, can you try putting return at the start of the vgacon_cursor()
function in drivers/video/vgacon.c and check if it fixes your cursor
problems?
Have a nice fortnight
--
Martin `MJ' Mares <mj@ucw.cz> http://atrey.karlin.mff.cuni.cz/~mj/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
"f u cn rd ths, u cn gt a gd jb n cmptr prgrmmng."
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