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[Bug 1097732] Re: Green screen with color depth of 16 bits

 

I'm using the openchrome driver and I'm seeing the green screen.  I'm installing linux on this old desktop for a family member.  I'm thinking about telling him to purchase a video card.
X.Org X server -- VIA display driver
1:0.3.3-1+b2: amd64 i386

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https://bugs.launchpad.net/bugs/1097732

Title:
  Green screen with color depth of 16 bits

Status in xserver-xorg-video-openchrome package in Ubuntu:
  Confirmed

Bug description:
  I have run into a problem with the openchrome driver, when used with
  color depth of 16 bits.  With the default depth of 24 bits everything
  works ok, but with color depth of 16 bits the screen is mostly green.

  The driver seems to be otherwise useable.  It is possible to correct
  the color problem somewhat with xgamma, but this does not really help
  the broken appearance.  However, the hardware cursor appears to have
  the right colour.

  I have tried various Xorg settings relating to EXA and such, but can
  not find a combination that would make a change for the better.
  Switching to a software cursor changes cursor color to a greener tint.

  My main motivation to get this to work is that there are some thin
  client hardware that should be very much useable with LTSP, and there
  is a remarkable speed difference when colour depths of 16 and 24 are
  used (16 being of course faster).

  Here is the lspci output for one machine in question:

  --
  00:00.0 Host bridge: VIA Technologies, Inc. CX700/VX700 Host Bridge (rev 10)
  00:00.1 Host bridge: VIA Technologies, Inc. CX700/VX700 Host Bridge
  00:00.2 Host bridge: VIA Technologies, Inc. CX700/VX700 Host Bridge
  00:00.3 Host bridge: VIA Technologies, Inc. CX700/VX700 Host Bridge
  00:00.4 Host bridge: VIA Technologies, Inc. CX700/VX700 Host Bridge
  00:00.7 Host bridge: VIA Technologies, Inc. CX700/VX700 Host Bridge
  00:01.0 PCI bridge: VIA Technologies, Inc. VT8237/VX700 PCI Bridge
  00:08.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
  00:0f.0 IDE interface: VIA Technologies, Inc. VX800 Serial ATA and EIDE Controller
  00:10.0 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 90)
  00:10.1 USB controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 90)
  00:10.4 USB controller: VIA Technologies, Inc. USB 2.0 (rev 90)
  00:11.0 ISA bridge: VIA Technologies, Inc. CX700/VX700 PCI to ISA Bridge
  00:11.7 Host bridge: VIA Technologies, Inc. CX700/VX700 Internal Module Bus
  00:13.0 PCI bridge: VIA Technologies, Inc. CX700/VX700 Host Bridge
  01:00.0 VGA compatible controller: VIA Technologies, Inc. CX700/VX700 [S3 UniChrome Pro] (rev 03)
  02:01.0 Audio device: VIA Technologies, Inc. VT8237A/VT8251 HDA Controller (rev 10)
  --

  On Lucid (10.04) and Precise (12.04) this machine/configuration works
  properly.  I can only reproduce the problem in Quantal (12.10).

  $ lsb_release -rd
  Description:	Ubuntu 12.10
  Release:	12.10

  $ apt-cache policy xserver-xorg-video-openchrome
  xserver-xorg-video-openchrome:
    Installed: 1:0.3.1-0ubuntu1
    Candidate: 1:0.3.1-0ubuntu1
    Version table:
   *** 1:0.3.1-0ubuntu1 0
          100 /var/lib/dpkg/status

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