Bug#619033: xserver-xorg-video-intel: External screen shakes

["John D. Hendrickson and Sara Darnell" <johnandsara2@cox.net>]

but you can set the sync modes before X startup or after - so saying it 
is UBUNTU's error is wrong.  it is Ubuntu's correctness to use the 
better frequencies maybe

VERY NORMAL.

I have used vga extended cables or switchbox, but not with that exact 
card - and using them reduces quality

video stability IS very picky / requires a ton of fidelity and 
bandwidth.  thus network cables can't carry video.  stability also 
depends on the monitor's electronics / abilities.  (btw I know nothing 
of LED monitor pinouts / signals)


Takaya Yamashita wrote:
> Package: xserver-xorg-video-intel
> Version: 2:2.14.0-4
> Severity: normal
>
> My external screen shakes when I connect it over VGA.
> The machine is a Thinkpad T410s with an i915 Intel controller.
> Of course, Windows works fine VGA output.
> Is is not individual problem, the other displays are similar, too.
> This problem seems to happen in Ubuntu[1].
>
> [1] External monitor using VGA has sync issues with KMS
> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/671921
>
> -- System Information:
> Debian Release: wheezy/sid
>   APT prefers unstable
>   APT policy: (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
> Architecture: amd64 (x86_64)
>
> Kernel: Linux 2.6.38-1-amd64 (SMP w/4 CPU cores)
> Locale: LANG=ja_JP.utf8, LC_CTYPE=ja_JP.utf8 (charmap=UTF-8)
> Shell: /bin/sh linked to /bin/dash
>
> Versions of packages xserver-xorg-video-intel depends on:
> ii  libc6                      2.11.2-13     Embedded GNU C Library: Shared lib
> ii  libdrm-intel1              2.4.23-3      Userspace interface to intel-speci
> ii  libdrm2                    2.4.23-3      Userspace interface to kernel DRM
> ii  libpciaccess0              0.12.1-1      Generic PCI access library for X
> ii  libudev0                   166-1         libudev shared library
> ii  libx11-6                   2:1.4.1-5     X11 client-side library
> ii  libx11-xcb1                2:1.4.1-5     Xlib/XCB interface library
> ii  libxcb-aux0                0.3.6-1       utility libraries for X C Binding
> ii  libxcb-dri2-0              1.7-2         X C Binding, dri2 extension
> ii  libxcb1                    1.7-2         X C Binding
> ii  libxext6                   2:1.2.0-2     X11 miscellaneous extension librar
> ii  libxfixes3                 1:4.0.5-1     X11 miscellaneous 'fixes' extensio
> ii  libxv1                     2:1.0.6-1     X11 Video extension library
> ii  libxvmc1                   2:1.0.6-1     X11 Video extension library
> ii  xserver-xorg-core [xorg-vi 2:1.9.4.901-1 Xorg X server - core server
>
> xserver-xorg-video-intel recommends no packages.
>
> xserver-xorg-video-intel suggests no packages.
>
> -- no debconf information