Re: [RFC PATCH kernel] Revert "fbcon: use the cursor blink interval provided by vt"

[Benjamin Herrenschmidt <benh@au1.ibm.com>]

On Wed, 2016-06-29 at 18:29 +1000, Benjamin Herrenschmidt wrote:
> On Wed, 2016-06-29 at 18:19 +1000, Alexey Kardashevskiy wrote:
> > This is rather a bugreport than actual revert but nevertheless.
> > 
> > Since 27a4c827c34a I started noticing weird traces and quite often
> > I could not boot my test machine which is POWER8 box with AST video
> > or ATI video (video adapter type does not matter much although
> > is happens lot more often with the OpenPOWER machine which got
> > AST).
> > The system console is IPMI, not the actual video adapter.
> > 
> > I bisected it to this:
> > 
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/com
> > mi
> > t/?id'a4c827c34ac4256a190cc9d24607f953c1c459
> > 
> > For some reason which I do not understand, in
> > cursor_timer_handler(),
> > ops->cur_blink_jiffies is zero. Why can this happen? What is a
> > proper
> > fix? Thanks.
> 
> Rings a bell... do you have fbcon: initialize blink interval before
> calling fb_set_par (f235f664a8afabccf863a5dee4777d2d7b676fda) ?

Also check if you have:

"fbcon: set a default value to blink interval"
(upstream ID a1e533ec07d583d01349ef13c0c965b8633e1b91).

> Cheers,
> Ben.