An expanded list of what works and doesn't work for me (not
double-tested, and where not specified I'm listing chips rather than
card mfr/model):
Worked:
- PCI Matrox Millennium II MGA 2164W (PCI card)
- Intel 82810E (integrated)
- An ATI-based AGP card sold as a MIC E-G012-02-1214(B)
- ATI Rage 128 Pro (AGP card)
- ATI Rage 128 (AGP card)
- HP VectaVL PC w/ integrated video, probably either:
Matrox G250 2X AGP
Matrox Millennium G400 4X AGP
Partially Worked (got past the blank, black screen but then failed somehow):
- Diamond STL III S540 XTRM32M 82 (AGP card)
- Diamond Spdstr A50 with SiS 6326AGP chip (AGP card)
Failed:
- Trident 3DImage 9850 (AGP card)
- S3 Trio64V+ (PCI card)
- Diamond Viper with Power Weitek 9000/9001 and Oak Technology T9351
chips (PCI card)
- ATI Mach64 (PCI card)
- eMachines eTower 500i w/ integrated video, probably:
ATI Rage Pro Turbo 2X AGP
On 12/7/2012 2:19 PM, John Hupp wrote:
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 11:21 AM, John Hupp wrote:
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
clientswhich presumably was solved, but now gives the appearance of
having returned. See
https://help.ubuntu.com/community/UbuntuLTSP/FatClients#Reenabling_NBD_compression
On my server, there was no /etc/ltsp/ltsp-update-image.conf file,
but I created one, added the NO_COMP line, and updated theimage.
This did not solve the problem with any clients I tested. Though
our respective setups are differenton a number of points, detailed
pretty well here:
https://lists.ubuntu.com/archives/edubuntu-users/2012-December/007206.html
(snip, snip, snip)
On 11/29/2012 5:53 PM, John Hupp wrote:
I thought I might be working through my last few big problems,
but instead I found another one.
After installing Lubuntu Quantal on a newly formatted disk and
setting up LTSP some weeks ago, I have been working only with a
certain two-machine test setup. In contrast to past
troubleshooting, I have not been swapping in multiple server or
client machines.
But to address something I was working on, I tried a different
client, and this one failed to boot altogether. Then I tried a
couple more different clients (different makes/models), and they
had the same behavior. That behavior is that after the client
displays the blue splash screen, which then drops to
black-and-white (normal behavior, I think), it then goes to a
blank (black) screen.It does not display the GUI login screen.
If in lts.conf I set SCREEN_07=shell, then I can successfully log
in to a shell. I also see there among the on-screen boot
messages "Starting load fallback graphics devices [fail]."
The last entry in dmesg also refers to the above failure.
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_____________________________________________________________________
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