Read on about Lubuntu 12.10 after this intro: I have been
troubleshooting a behavior in which many LTSP clients on my Lubuntu
12.10 LTSP server fail to boot. They stall after the Lubuntu splash
screen at a blank, black screen.
But one of the PC's that fails to boot as an LTSP client also * has
enough resources to boot the Lubuntu 12.10 Live CD*, so I tried that,
and I found that it fails to boot with the same stalled blank, black
screen after the Lubuntu splash screen. I left it like that for ~ 15
minutes to check for an 8-minute stall (which another user reported
elsewhere), and it didn't budge.
Since Valerio P is troubleshooting (below) what seems like the same
behavior with LTSP clients on Edu/Ubuntu 12.04 servers, and since I show
the same behavior also on a Lubuntu 12.10 Live CD, I now wonder if this
is a *buntu 12.04/12.10 problem related to certain chipsets or video
chips. Complicating that observation somewhat, I note this machine I
just ran the Live CD on had run both Lubuntu and Ubuntu 12.04 without
such a behavior.
On 12/4/2012 4:16 PM, John Hupp wrote:
> Valerio Pachera on the Edubuntu list has been troubleshooting what
seems like the very same problem. His thread came apart somehow but you
can see all the posts here:
https://lists.ubuntu.com/archives/edubuntu-users/2012-December/thread.html
>
> He got his clients working *most* of the time by disabling NBD
compression. (Undoubtedly performance has taken a hit.) He refers to
documentation of a previous problem with NBD compression on fat clients
which presumably was solved, but now gives the appearance of having
returned. See
https://help.ubuntu.com/community/UbuntuLTSP/FatClients#Reenabling_NBD_compression.
However, one LTSP gurureplied that it was likely that NBD compression
was not the cause of the problem, but was merely allow the real cause to
manifest this behavior.
>
> I checked out the NBD compression issue nonetheless. On my server,
there was no /etc/ltsp/ltsp-update-image.conf file, but I created one,
added the NO_COMP line, and updated the image. This did not solve the
problem with any clients I tested. Though our respective setups are
different on a number of points, detailed pretty well here:
https://lists.ubuntu.com/archives/edubuntu-users/2012-December/007206.html
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