Re: [Bugme-new] [Bug 10205] New: BUG: Display gets corrupted when using lxfb driver on a GeodeLX 5535 based chipset

[Andrew Morton <akpm@linux-foundation.org>]

On Sun, 9 Mar 2008 22:31:13 +0100 "Rafael J. Wysocki" <rjw@sisk.pl> wrote:

> On Sunday, 9 of March 2008, Andrew Morton wrote:
> > On Sun,  9 Mar 2008 08:55:52 -0700 (PDT) bugme-daemon@bugzilla.kernel.org wrote:
> > 
> > > http://bugzilla.kernel.org/show_bug.cgi?id=10205
> > > 
> > >            Summary: BUG: Display gets corrupted when using lxfb driver on a
> > >                     GeodeLX 5535 based chipset
> > >            Product: Drivers
> > >            Version: 2.5
> > >      KernelVersion: 2.6.24.2
> > >           Platform: All
> > >         OS/Version: Linux
> > >               Tree: Mainline
> > >             Status: NEW
> > >           Severity: normal
> > >           Priority: P1
> > >          Component: Console/Framebuffers
> > >         AssignedTo: jsimmons@infradead.org
> > >         ReportedBy: nestorac@gmail.com
> > > 
> > > 
> > > Latest working kernel version:
> > >  None or unknown
> > > Earliest failing kernel version:
> > >  Latest version
> > > Distribution:
> > >  Debian Stable (Etch)
> > > Hardware Environment:
> > >  AMD Geode 32 bit A830 board, 5536 chipset based embedded computer (TFT 10"
> > >  800x600), with GeodeLX embedded GPU. It's webpage is at:
> > >  http://www.winmatev.com.tw/PPc/PPcSpec.asp?Prod=03_0013&Typeid=03020101
> > >  I own a cheaper version using GeodeGX 500 processor, 256MiB RAM, no
> > >  touchscreen.
> > > Software Environment:
> > >  Debian 4.0 Stable (Etch), Kernel 2.4.22.2 vanilla + AUFS patch (it has nothing
> > >  to do with graphics, but BTW...), all i386, kernel specifically compiled for
> > >  Geode GX/LX Processor target (but also does not work for generic i386 target).
> > > Problem Description:
> > >  I get a blurry screen when trying to enable Framebuffer, vga=788
> > >  option (800x600). Screen gets corrupted, but when I start X.org, it shows
> > >  Ok, until I switch again to console. Everything works fine with Vesa FB,
> > >  except that, of course, it's more CPU consuming and slower [supposedly].
> > >  When blurry, screen looks like it was under a lake.
> > > Steps to reproduce:
> > >  1) Compile the kernel, include support for GeodeLX Framebuffer.
> > >  2) Install the kernel on the machine
> > >  3) Boot it up, adding vga=788 mode to bootloader.
> > >  4) Screen gets completely blurry until X.org starts.
> > > 
> > 
> > Guys, this is a post-2.6.24 regression
> 
> Hm, what exactly makes you think so?

Beats me.  I was probably looking at the wrong report when I decided that.

> The failing kernel version is 2.6.24.2, so most probably the problem is present
> in 2.6.24 as well.
> 
> Moreover, the reporter didn't specify the last known good kernel, so it might
> not be a regression at all.

Yup.

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