[i915] Video mode problems in high resolutions for Intel Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03)

[Jarno Suni]

I have a laptop and connected external CRT screen Hitachi CM751ET. When I use one of the higher resolution video modes (1400x1050 or 1600x1200) for the external monitor and no video mode for the integrated display, the video mode of the CRT starts to flicker in certain cases:

1) After I press Ctrl-Alt-F1 Ctrl-Alt-F7
2) After I start video playback by gxine or vlc; vlc don't work even in the dual-screen mode.

There are other cases, too.

OS: Xubuntu 8.04

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 915GM/PM/GMS/910GML Express Processor to DRAM Controller [8086:2590] (rev 03)
     Subsystem: Acer Incorporated [ALI] Device [1025:006a]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 03)
     Subsystem: Acer Incorporated [ALI] Device [1025:006a]

[Jarno Suni (jarnos)]

Log file in case (1)

[Charlie Kravetz (cjkgeek)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage . I have classified this bug as a bug in xorg.
For future reference you might be interested to know that a lot of applications have bug reporting functionality built in to them. This can be accessed via the Report a Problem option in the Help menu for the application with which you are having an issue. You can learn more about this feature at https://wiki.ubuntu.com/ReportingBugs.

[Charlie Kravetz (cjkgeek)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please attach the output of lspci -vvnn (that is "- v v n n" without the spaces, not " - w n n"). Thanks in advance.

[Charlie Kravetz (cjkgeek)]

Thanks for reporting this bug and any supporting documentation. Since this bug has enough information provided for a developer to begin work, I'm going to mark it as confirmed and let them handle it from here. Thanks for taking the time to make Xubuntu better! Your assistance is greatly appreciated!

[Bryce Harrington (bryce)]

Hmm, next I'd like to forward this issue upstream, but first it must be retested on latest Jaunty to make sure the issue still happens there with the latest code. ISO images are available at http://cdimages.ubuntu.com/releases/jaunty/. If you can reproduce it in the LiveCD environment, you shouldn't need to modify your installed system. Also please attach a fresh Xorg.0.log from this testing.

[Jarno Suni (jarnos)]

I can't do it myself since I don't have the hardware currently.

[Bryce Harrington (bryce)]

Since the hardware is no longer available for doing troubleshooting with, we'll have to close the bug for now. However please feel free to reopen if you or anyone else has the same HW and can reproduce this issue using the latest development version of Ubuntu and is willing to do some troubleshooting with it.