Kalle Olavi Niemitalo <kon@iki.fi> writes:
> 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.
That is actually x11-session-utils 7.3+1.
> - 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 looked in xserver-xorg-video-mga_1.4.4.dfsg.1.orig.tar.gz
and it seems to ignore the V_DBLSCAN flag on the second CRTC
too. Perhaps the hardware doesn't support that feature?
However, in xserver-xorg-video-mga-1.9.100.dfsg.1/mga_driver.c,
MGAPreInit does this:
clockRanges->interlaceAllowed = !pMga->SecondCrtc;
clockRanges->doubleScanAllowed = TRUE;
If doublescan were not possible on the second CRTC, presumably
this would check pMga->SecondCrtc on the second line too?
> - 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.
In both versions, MGAGUseHWCursor in mga_dacG.c does:
if( pMga->SecondCrtc == TRUE )
return FALSE;
In 1.4.4.dfsg.1, MGAPreInitMergedFB used to set pMga->SecondCrtc
= TRUE. This code has apparently been removed from
1.9.100.dfsg.1; pMga->SecondCrtc is now always FALSE.
I presume MGAGUseHWCursor should now be somehow hooked to
crtc_mode_set in mga_g_crtc2.c, so that it begins returning
FALSE when the second CRTC is turned on.
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