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ABI sequencing analysis on quicksilver G4?

Matthew Randesi randesm at mail.rockefeller.edu
Tue Jan 22 10:09:39 EST 2002

> Hi, we have just purchased a new "quicksilver" G4 to help speed up
> gel analysis using ABI's Sequencing Analysis 3.4.1 (and MacOs 9.2),
> but are seeing what appears to be an incompatibility with the std
> graphics card. When scrolling across a gel image, the screen fails to
> refresh properly, and newly appearing bits of the gel have large gaps
> in them where the screen only draws grey, and / or the tracking lines
> are missing. This is far worse when scrolling from side to side, than
> when scrolling up/down. If you collapse and reopen the gel file
> window, the screen redraws correctly, but as soon as you scroll, it
> corrupts again.
> Has anyone else encountered this, knows of a fix? We have tried
> increasing program memory, changing screen resolutions and colour
> depths, swapping monitors etc, all to no avail. ABI's only suggestion
> to date was to remove the graphics card and revert to a poorer
> quality one which seems somewhat of a throwback approach. NB. it
> behaves perfectly when run on the previous design G4 minitower, or on
> a titanium G4 powerbook (both MacOs 9.1)
> Thanks

I have encountered the same problem with a G4, scrolling through a 377 gel
image causes the screen fails to refresh properly thereby leaving large
sections of the screen blank unless I collaspe the window and reopen it.  I
have yet to find a fix for this problem.  Would love to hear it if anyone
has the solution.

Matthew Randesi
Lab Manager, DNA Sequencing Laboratory
The Protein/DNA Technology Center
HHMI / The Rockefeller University
1230 York Ave., Box 105
New York, New York  10021




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