HP T5740 boot panic

[Barry Cisna]

Hello All,

Just purchased a new HP T5740 TC to test with,to use with about a one
year old install of (LTSP 6.0 SL client).

The unit kernel panics at boot,so I updated the bios to the latest
available bios from HP, with fingers crossed hoping possibly the later
bios would remedy the boot panic.Of course this didn't change the
situation.

After doing some searching it appears the Broadcom nic in these units is
the snag on the boot process.
I have seen several workarounds to get these units to boot,mostly being
building an Ubuntu boot image to drop into the tftp dir on the server.

We have had several of the HP T5730's that would boot up fine out of the
box.

Anyone tried the HP T5740 Atom 1.6 ghz ,Intel i915 video,broadcom
nic,atheros wireless.?

Thank You,
Barry

[Jim Kinney]

Some Broadcom nics are closed source driver issues (Grr!). You may have one
of these. You'll need to use a module from rpmfusion-nonfree to get the nic
to work on the TC. That will require a boot kernel rebuild and a rebuild of
the initrd. The Ubuntu image works because they are not based in the US and
often ship code that is not freely available fro distribution.


On Fri, Apr 18, 2014 at 10:52 AM, Barry Cisna

Post by Barry Cisna
Hello All,
Just purchased a new HP T5740 TC to test with,to use with about a one
year old install of (LTSP 6.0 SL client).
The unit kernel panics at boot,so I updated the bios to the latest
available bios from HP, with fingers crossed hoping possibly the later
bios would remedy the boot panic.Of course this didn't change the
situation.
After doing some searching it appears the Broadcom nic in these units is
the snag on the boot process.
I have seen several workarounds to get these units to boot,mostly being
building an Ubuntu boot image to drop into the tftp dir on the server.
We have had several of the HP T5730's that would boot up fine out of the
box.
Anyone tried the HP T5740 Atom 1.6 ghz ,Intel i915 video,broadcom
nic,atheros wireless.?
Thank You,
Barry
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--
--
James P. Kinney III

Every time you stop a school, you will have to build a jail. What you gain
at one end you lose at the other. It's like feeding a dog on his own tail.
It won't fatten the dog.
- Speech 11/23/1900 Mark Twain


*http://heretothereideas.blogspot.com/
<http://heretothereideas.blogspot.com/>*

[William Fragakis]

Not knowing what Jim just told you, I ended up using a Debian boot
image. Installed LTSP in a Debian VM and then copied it over.

If you need the image/files, etc, email me off list. Additional quirk is
that you have to make it ignore what it thinks is its built in screen
and use the vga connection instead. Otherwise, you end up on a "second"
screen. Add video=LVDS-1:d to the boot parameters in your files
in /var/lib/tftpboot/ltsp/your_image/pxelinux.cfg

e.g.
label ltsp-NFS
menu label LTSP, using NFS
kernel vmlinuz-3.10-3-486
append ro initrd=initrd.img-3.10-3-486 init=/sbin/init-ltsp quiet root=/dev/nfs ip=dhcp boot=nfs video=LVDS-1:d
ipappend 2

(append is all one line until ipappend in case your email reader wraps it)

They are solid units. Typing on one presently.

Regards,
William

Message: 5
Date: Fri, 18 Apr 2014 11:02:20 -0400
To: "Support list for open source software in schools."
Subject: Re: [K12OSN] HP T5740 boot panic
<CAEo=5Pzf826jVduG5NgMcvdY9vcf
Content-Type: text/plain; charset="utf-8"
Some Broadcom nics are closed source driver issues (Grr!). You may
have one
of these. You'll need to use a module from rpmfusion-nonfree to get
the nic
to work on the TC. That will require a boot kernel rebuild and a
rebuild of
the initrd. The Ubuntu image works because they are not based in the
US and
often ship code that is not freely available fro distribution.
On Fri, Apr 18, 2014 at 10:52 AM, Barry Cisna

Post by Barry Cisna
Hello All,
Just purchased a new HP T5740 TC to test with,to use with about a

one

Post by Barry Cisna
year old install of (LTSP 6.0 SL client).
The unit kernel panics at boot,so I updated the bios to the latest
available bios from HP, with fingers crossed hoping possibly the

later

Post by Barry Cisna
bios would remedy the boot panic.Of course this didn't change the
situation.
After doing some searching it appears the Broadcom nic in these

units is

Post by Barry Cisna
the snag on the boot process.
I have seen several workarounds to get these units to boot,mostly

being

Post by Barry Cisna
building an Ubuntu boot image to drop into the tftp dir on the

server.

Post by Barry Cisna
We have had several of the HP T5730's that would boot up fine out of

the

Post by Barry Cisna
box.
Anyone tried the HP T5740 Atom 1.6 ghz ,Intel i915 video,broadcom
nic,atheros wireless.?
Thank You,
Barry

[Barry R Cisna]

Hello All,

A big Thank You to William Fragakis for providing an easy fix for the HP
T5740 not booting properly. It was a simple copying of an Debian based
boot kernel in an extra directory on the K12Linux/LTSP server and the TC
booted without a hitch.

Barry