** Description changed: Binary package hint: xserver-xorg-video-intel Hi, I am experiencing problems with the VGA Output in 10.04 (lucid), but it worked fine in 9.10 (karmic). I did a clean installation, not an upgrade, but could verify that the problems are not there in 9.10 by using the livecd. I have tried many of the suggested KMS-related workarounds (including disabling DRI, using glasen's 855gm-fix ppa, disabling KMS on boot etc.) and also tried x-updates and x-retro PPAs to use driver 2.8 and 2.11 instead of 2.9. However, the problem with the black screen went away, but with *each* of the various combinations I get screen flickering on the VGA output, when screen updates are made (i.e. keyboard input or mouse movement). I am using the 1024x768 resolution on the internal screen, and also 1024x768 on the external output. I tried this with 2 beamers and one external monitor - the same problem persists everywhere. When I change the external output's resolution to a higher resolution like 1152x862 or 1280x1024, the problems are gone. By switching to a lower resolution (i.e. 800x600), the problems still persist. I have tried various of the intel driver's options (disabling DRI, pageflip, using UXA rendering etc.) but none of my attempts was successful in adressing this problem. I have attached a demonstration video of the problem and the system information collected by apport. + + [lspci] + [ 2.220800] agpgart-intel 0000:00:00.0: Intel 855GM Chipset + [ 2.221207] agpgart-intel 0000:00:00.0: detected 8060K stolen memory + [ 2.223422] agpgart-intel 0000:00:00.0: AGP aperture is 128M @ 0xe0000000 + 00:00.0 Host bridge [0600]: Intel Corporation 82852/82855 GM/GME/PM/GMV Processor to I/O Controller [8086:3580] (rev 02) + Subsystem: IBM Device [1014:055c] + 00:02.0 VGA compatible controller [0300]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02) + Subsystem: IBM Device [1014:0557] + 00:02.0 VGA compatible controller [0300]: Intel Corporation 82852/855GM Integrated Graphics Device [8086:3582] (rev 02) + Subsystem: IBM Device [1014:0557] + P: /devices/pci0000:00/0000:00:00.0 + E: DEVPATH=/devices/pci0000:00/0000:00:00.0 + E: PCI_SLOT_NAME=0000:00:00.0 + KERNEL[1275565668.048724] add /devices/pci0000:00/0000:00:00.0 (pci) + DEVPATH=/devices/pci0000:00/0000:00:00.0 + PCI_SLOT_NAME=0000:00:00.0 + UDEV [1275565668.061234] add /devices/pci0000:00/0000:00:00.0 (pci) + DEVPATH=/devices/pci0000:00/0000:00:00.0 + PCI_SLOT_NAME=0000:00:00.0
-- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/589140 Title: [i855gm] VGA out flickering after upgrade to lucid (regression) _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
