To give my supposition a bit more weight, I removed the discrete video
card from a working Lubuntu 12.10 machine and installed it in the
machine that fails both as a client and a standalone-with-Live-CD. It
then successfully booted the Live CD.
The card that worked was an old PCI Matrox Millennium II MGA 2164W.
The card that failed was a slightly newer AGP card with a Trident
3DImage 9850 chip.
On 12/7/2012 11:32 AM, John Hupp wrote:
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
--
Lubuntu-users mailing list
Lubuntu-users@lists.ubuntu.com
Modify settings or unsubscribe at:
https://lists.ubuntu.com/mailman/listinfo/lubuntu-users
