Bug#403556: xserver-xorg-video-mga: VT switch dims 16-bit-color screen 0 when screen 1 is 24-bit
Kalle Olavi Niemitalo wrote:
This bug was triggered by different color depths in the two
screens driven by the same MGA card. Is it even possible to
configure the new version that way? The HowToRandR12 page
recommends defining only a single screen in xorg.conf and then
configuring multiple outputs while the X server is running.
Oh right, of course, it is not possible to do that. RandR 1.2 enforces
the same depth on all outputs in a big single screen.
Being unable to define different screens is a problem because it
makes xsm (of x11-utils 7.3+1) divide its window halfway between
the two monitors.
Other people also don't like having a single screen for other reason.
There were multiple complains on the upstream list or bugzilla but the
devs still don't want to bring it back, they think the WM should
implement an emulated multi-screen on top of RandR 1.2 multiple outputs.
One of the monitors I am using is a fixed-frequency HP A1097C,
which does not support DDC. It thus appears I now have to set
the modes in /etc/X11/xdm/Xsetup (attached).
You can also do that in xorg.conf using ModeLine and PreferredMode as
explained in the HowToRandR12.
- I don't get a mouse cursor on the second monitor. At first I
thought it might be some presentation feature, activated when
the monitors are displaying the same picture otherwise.
However it also happens when they are configured side by side.
Yes, we have bug report #457502 about this.
- If I configure "Virtual 2648 1024" to snugly fit the 1280x1024
and 1368x1024 pixel outputs side by side, the Debian logo in
the xdm login window appears correct but the window itself is
badly sheared, appearing as a centimeter-wide strip that wraps
thrice through the sides of the screen.
Does it help if you use a "common" resolution such as 1280x1024 or
1024x768 instead of 1368x1024?
- The DoubleScan flag seems to be ignored on the VGA2 output.
I am not entirely sure it worked in the previous version either.
However, the same mode works correctly on the VGA1 output
I have no idea about this, feel free to open a new bug report about this
one, either on bugzilla.freedesktop.org or here (and I will forward it
on bugzilla.freedesktop.org).
Brice
Reply to: