Brice Goglin [2007-12-24 15:41]: Hi,
sorry for the late response. >>> - 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? >> > > Looks correct to me but Tilman will now more :) This came up some months ago, too. Back then I promised to look into it, but didn't :( We need to find out whether the double scan failure is because of the CRTC, or because of the output. Maybe CRTC2 doesn't support double scan, but maybe it's output2. >>> - 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. You'll have to use Option "HWCursor" "Off" with xf86-video-mga 1.9.100. Unfortunately, the cursor layer that comes with the randr 1.2 API doesn't allow us to use the one hardware cursor that the chip has (tied to crtc1) and a software cursor for crtc2 :/ HTH, Tilman -- A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing on usenet and in e-mail?
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