ubuntu-x-swat team mailing list archive

[legolas558 <6270@xxxxxxxxxxxxxxxxxx>]

Yesterday I collected an (apparently) useful information regarding the
i855GM (rev.02) hardware (which I own):

after a linux session I rebooted into windows xp, activated the TV-OUT
and used it to watch for many hours. Then I rebooted into linux and just
before Xorg rewrote the video buffer, I could see the previous linux
session's buffer (with some minimal noise added). This had happened
previously when rebooting from linux to linux, and can be explained
because there is some RAM persistence in the i855GM.

But if the persistence happens equally when using another video driver,
e.g. Windows i855 driver, then it means that the linux intel driver uses
*different* RAM than the Windows driver, maybe some PIPE A/B difference?

It's even more interesting to note that on Windows I used the normal LCD
display and also the TV-OUT, while on Linux only the LCD display which
obviously must have been feeded by RAM which was not touched by Windows
for many hours.

Can somebody explain this differently?

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https://bugs.launchpad.net/bugs/6270

Title:
  [i855] no support for TV-Out on 8xx chipsets