client specific problem

[John Hupp]

On 12/7/2012 11:16 AM, John Hupp wrote:
>
> On 12/5/2012 5:48 AM, Valerio Pachera wrote:
>> 2012/12/4 Alkis Georgopoulos<alkisg at gmail.com>:
>>> I haven't yet seen a single case where NBD compression caused problems.
>>> But I've seen numerous cases where NBD compression made *another*
>>> problem move obvious, due to the data validation it does.
>> The first thing I've done was testing the ram memory by memtest and it was ok.
>> I've been testing the client connecting it directly to the eth0 of the
>> server, so no possible switch issues;
>> the behavior is the same of the class room.
>> I also tried to add a simple rtl8129 network card and boot by
>> etherboot. No changes.
>> I tried to change video card or force vesa. No significant changes
>> I tried another pc with the same motherboard and it behaves the same.
>> I also updated the bios.
>>
>> To esclude ndb related problem I reverted to nfs, but no changes there either.
>>    https://help.ubuntu.com/community/UbuntuLTSP/LTSPWithoutNFS
>>
>> Here is my lspci
>> ----------
>> 00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM
>> Controller (rev 10)
>> 00:02.0 VGA compatible controller: Intel Corporation 82G33/G31 Express
>> Integrated Graphics Controller (rev 10)
>> 00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High
>> Definition Audio Controller (rev 01)
>> 00:1c.0 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express
>> Port 1 (rev 01)
>> 00:1c.1 PCI bridge: Intel Corporation NM10/ICH7 Family PCI Express
>> Port 2 (rev 01)
>> 00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI
>> Controller #1 (rev 01)
>> 00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI
>> Controller #2 (rev 01)
>> 00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI
>> Controller #3 (rev 01)
>> 00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI
>> Controller #4 (rev 01)
>> 00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI
>> Controller (rev 01)
>> 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
>> 00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC
>> Interface Bridge (rev 01)
>> 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE
>> Controller (rev 01)
>> 00:1f.2 IDE interface: Intel Corporation NM10/ICH7 Family SATA
>> Controller [IDE mode] (rev 01)
>> 00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 01)
>> 01:00.0 Ethernet controller: Atheros Communications Inc.
>> AR8121/AR8113/AR8114 Gigabit or Fast Ethernet (rev b0)
>> -----------
>>
> Regarding what seems like the same LTSP client problem that I'm still 
> troubleshooting here: 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 you are troubleshooting 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 
> that I just ran the Live CD on had run both Lubuntu and Ubuntu 12.04 
> without such a behavior.
>

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.
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