[Xorg-driver-geode] Redraw problems

[Christian Gmeiner]

Hi Martin-Éric,

2011/10/17 Martin-Éric Racine <martin-eric.racine at iki.fi>:
> 2011/10/12 Christian Gmeiner <christian.gmeiner at gmail.com>:
>> I am running the latest and greatest version of the geode driver
>> 2.11.12 and run into a problem with the refresh
>> of some dirty areas. I have a small Java based SWT application, which
>> fails to get redrawn after switching between
>> register card tabs. If I am using the vesa driver, everything is okay.
>> How can I debug this issue?
>>
>> X.Org X Server 1.7.7
>> Release Date: 2010-05-04
>> X Protocol Version 11, Revision 0
>> Build Operating System: Linux 2.6.32.29-dsa-ia32 i686 Debian
>> Current Operating System: Linux OT 2.6.36.4-bachmann #1 Wed Sep 14
>> 19:15:45 CEST 2011 i586
>> Kernel command line: root=/dev/sda2 rootwait rhgb splash
>> console=ttyS0,19200 console=tty0 libata.dma=4 video=lxfb:noclear
>> lxfb.mode_option=640x480 at 60
>> Build Date: 19 February 2011  02:37:36PM
>> xorg-server 2:1.7.7-13 (Cyril Brulebois <kibi at debian.org>)
>> Current version of pixman: 0.16.4
>
> This seems awfully similar to Debian bug #570637. Please see if you
> can contribute additional information.

The problem happens for me with Option "NoAccel", so it should not be
related to EXA. Is here a special define etc. I could turn on to get some
debug informations in the driver?

>
> On another issue, I notice that you're using lxfb as your console
> driver. Please avoid it. The code hasn't been updated in ages and
> there were various drawing issue left unresolved. Also, the driver
> fails to understand the method used by GRUB2 to set the screen mode.
> Instead, I'd recommend using vesafb.
>

On some devices, we use a LQ057V3DG01 panel and I patched lxfb_core to add
support for this panel type. So in our custom bootloader I can check
if this panel
is used and add lxfb.mode_option=LQ057V3DG01to the cmdline of the kernel.
I need to run some tests to see if vesafb does not need this workaround.

Christian Gmeiner, MSc