[BUG] 2.5.71: no cursor until tty output

[BUG] 2.5.71: no cursor until tty output

[Russell King]

There appears to be a bug in fbcon where the soft cursor does not appear
on the screen until some tty output occurs.  I suspect soft cursor is
missing some initialisation somewhere; I have once seen some random garbage
flashing on the screen instead of the cursor, which seems to be where
the cursor is supposed to be.

When tty output occurs, the characters appear where the garbage was, and
the normal cursor appears.

I've noticed this on several fbcon drivers, so I don't believe it is a
generic fbcon bug.

-- 
Russell King (rmk@arm.linux.org.uk)                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html



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Re: [Linux-fbdev-devel] [BUG] 2.5.71: no cursor until tty output

[James Simmons]

> There appears to be a bug in fbcon where the soft cursor does not appear
> on the screen until some tty output occurs.  I suspect soft cursor is
> missing some initialisation somewhere; I have once seen some random garbage
> flashing on the screen instead of the cursor, which seems to be where
> the cursor is supposed to be.
> 
> When tty output occurs, the characters appear where the garbage was, and
> the normal cursor appears.
> 
> I've noticed this on several fbcon drivers, so I don't believe it is a
> generic fbcon bug.

I know which bug you are talking about. I have a fix already in the BK 
tree. Softcursor.c uses the image drawing function. Unfortunely 
softcursor.c assumes that imageblit always process 8 bit padded data. This 
is not always the case. I noticed this with the rivafb driver. I have a 
fix in the fbdev BK tree. A few more bugs need to be fixed tho for the 
software cursor :-( They are coming.