Thread (40 messages) 40 messages, 6 authors, 2013-12-20

Re: cirrusdrmfb broken with simplefb

From: Ingo Molnar <mingo@kernel.org>
Date: 2013-12-19 12:31:44
Also in: lkml

* David Herrmann [off-list ref] wrote:
Hi

On Thu, Dec 19, 2013 at 1:03 AM, One Thousand Gnomes
[off-list ref] wrote:
quoted
quoted
quoted
That bug always existed, simplefb is just the first driver to hit it
(vesafb/efifb didn't use resources). I'm aware of the issue but as a
workaround you can simply disable CONFIG_X86_SYSFB. That restores
the old behavior.
This looks like a regression, so we'll either need a fix or we'll have
to mark CONFIG_X86_SYSFB as CONFIG_BROKEN.
Kernel bugzilla has entries for simplefb breaking both vesafb and 
matrox mga.
Thanks for the hints. I've read through all I could find and tried 
to provide some help.

I'm kind of confused, most of them enable CONFIG_X86_SYSFB (which is 
'n' by default) but don't read the help text. I did my best to tell 
people that this option requires CONFIG_FB_SIMPLE, but if you don't 
read the help-text you won't notice that. Don't know what to do 
about that..
People generally don't read the help text - still the kernel should 
not break. So please the Kconfig angle (and the bootup logic, etc.) 
fool-proof, graphics failures are not fun to debug!

Thanks,

	Ingo
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