[Bug 1083032] Re: Video driver not working for Savage chipset

[Chris Halse Rogers]

** Description changed:

- When installing 12.10 on our Thinkpad T22 laptops the display does not work. 12.04 works fine. 
+ [Impact] 
+ For xserver-xorg-video-savage: Display corruption in X on (at least) Thinkpad T22 laptops, making the system unusable.
+ For xorg-server: System lockup on boot.
+ 
+ [Test Case]
+ Attempt to boot a system with one of the affected Savage cards; the Thinkpad T22 is at least one such system.
+ 
+ The display will be corrupted beyond usability.
+ 
+ Install xserver-xorg-video-savage and xserver-xorg-core from proposed,
+ and you should have a usable X session.
+ 
+ [Regression Potential] 
+ The X server patch touches only the DRI1 initialisation codepath; this is not used for the vast majority of systems, so breakage is low-impact. Breakage here would most likely manifest as an Xserver crash on startup.
+ 
+ The savage patch switches the default acceleration method to EXA (from
+ XAA) and adds some fixes to EXA support. Since we don't build XAA
+ support into the X server any more, so switching away from it means
+ enabling acceleration, which can cause pretty much arbitrary problems,
+ but is unlikely to. In any case, problems would be restricted to users
+ of xserver-xorg-video-savage.
+ 
+ [Original Report]
+ 
+ When installing 12.10 on our Thinkpad T22 laptops the display does not work. 12.04 works fine.
  xserver-xorg-video-s3 is version 1:0.6.5-0ubuntu1
  xserver-xorg-video-savage is version 1:2.3.6-0ubuntu1
  I don't know if these are the packages involved but they are the ones that I suspect may be involved.
  This T22 model (and many other thinkpads from that era) use the "S3 Savage IX8" chipsets.
  
  Using the info from this link makes the display work.
  =====
  http://www.physics.wustl.edu/~alford/thinkpad/T23_F17.html
  
- Xorg :1 -configure  
+ Xorg :1 -configure
  # ignore Configuration Failed message
  cp xorg.conf.new /etc/X11/xorg.conf
  
- Edit the /etc/X11/xorg.conf file: uncomment Option "DisableTile" in the Section "Device" that contains the Savage driver options. 
+ Edit the /etc/X11/xorg.conf file: uncomment Option "DisableTile" in the Section "Device" that contains the Savage driver options.
  ============

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https://bugs.launchpad.net/bugs/1083032

Title:
  Video driver not working for Savage chipset

Status in X.Org X server:
  Confirmed
Status in “xorg-server” package in Ubuntu:
  Fix Released
Status in “xserver-xorg-video-savage” package in Ubuntu:
  Fix Released
Status in “xorg-server” source package in Raring:
  New
Status in “xserver-xorg-video-savage” source package in Raring:
  New

Bug description:
  [Impact] 
  For xserver-xorg-video-savage: Display corruption in X on (at least) Thinkpad T22 laptops, making the system unusable.
  For xorg-server: System lockup on boot.

  [Test Case]
  Attempt to boot a system with one of the affected Savage cards; the Thinkpad T22 is at least one such system.

  The display will be corrupted beyond usability.

  Install xserver-xorg-video-savage and xserver-xorg-core from proposed,
  and you should have a usable X session.

  [Regression Potential] 
  The X server patch touches only the DRI1 initialisation codepath; this is not used for the vast majority of systems, so breakage is low-impact. Breakage here would most likely manifest as an Xserver crash on startup.

  The savage patch switches the default acceleration method to EXA (from
  XAA) and adds some fixes to EXA support. Since we don't build XAA
  support into the X server any more, so switching away from it means
  enabling acceleration, which can cause pretty much arbitrary problems,
  but is unlikely to. In any case, problems would be restricted to users
  of xserver-xorg-video-savage.

  [Original Report]

  When installing 12.10 on our Thinkpad T22 laptops the display does not work. 12.04 works fine.
  xserver-xorg-video-s3 is version 1:0.6.5-0ubuntu1
  xserver-xorg-video-savage is version 1:2.3.6-0ubuntu1
  I don't know if these are the packages involved but they are the ones that I suspect may be involved.
  This T22 model (and many other thinkpads from that era) use the "S3 Savage IX8" chipsets.

  Using the info from this link makes the display work.
  =====
  http://www.physics.wustl.edu/~alford/thinkpad/T23_F17.html

  Xorg :1 -configure
  # ignore Configuration Failed message
  cp xorg.conf.new /etc/X11/xorg.conf

  Edit the /etc/X11/xorg.conf file: uncomment Option "DisableTile" in the Section "Device" that contains the Savage driver options.
  ============

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