Hello, I'm at a loss as to what's causing this issue on my setup.
I have a CentOS 7.3 server with cobbler and xinetd. I have a pxe menu entry for the vanilla centos LiveCD that looks like this:
/images/centos_livecd/centos_vmlinuz initrd=/images/centos_livecd/centos_livecd_initrd.img ksdevice=bootif lang= root=live:/centos_livecd.iso kssendmac text ks= http://10.101.24.21/cblr/svc/op/ks/profile/centos_livecd BOOTIF=<MAC>
The non-working behavior is: - Hit enter - Kernel downloads - Initrd downloads, but silently (only 3 "."s show up, but I can tell its downloading watching tcpdump) - The download finishes, the screen flashes, and the PXE menu comes back up - Subsequent retries result in the menu flashing and coming back up with an "invalid kernel parameter" error
Again - I have about 15 units of varying motherboard and platform NOT working, and about 40 or so units of varying motherboard and platform that ARE working with the exact same menu entry and no configuration differences.
Can anyone help me?
just a guess, but do you have some variants that are UEFI and others that are not?
Andrew Simpson
On Fri, Jul 28, 2017 at 3:53 PM, Locane locane@gmail.com wrote:
Hello, I'm at a loss as to what's causing this issue on my setup.
I have a CentOS 7.3 server with cobbler and xinetd. I have a pxe menu entry for the vanilla centos LiveCD that looks like this:
/images/centos_livecd/centos_vmlinuz initrd=/images/centos_livecd/centos_livecd_initrd.img ksdevice=bootif lang= root=live:/centos_livecd.iso kssendmac text ks= http://10.101.24.21/cblr/svc/op/ks/profile/centos_livecd BOOTIF=<MAC>
The non-working behavior is:
- Hit enter
- Kernel downloads
- Initrd downloads, but silently (only 3 "."s show up, but I can tell its
downloading watching tcpdump)
- The download finishes, the screen flashes, and the PXE menu comes back
up
- Subsequent retries result in the menu flashing and coming back up with
an "invalid kernel parameter" error
Again - I have about 15 units of varying motherboard and platform NOT working, and about 40 or so units of varying motherboard and platform that ARE working with the exact same menu entry and no configuration differences.
Can anyone help me?
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| From: Andrew Simpson simpsonar77@gmail.com
| just a guess, but do you have some variants that are UEFI and others that | are not?
Or some with Secure Boot enabled (thus requiring properly signed objects) and others without?
Bonus hint: Sometimes these options are disguised in the firmware setup page. I found out this week that the way to switch between "legacy" and UEFI mode is by an option called "Windows 8/8.1 feature" on my MSI Cubi https://forum-en.msi.com/index.php?topic=289811.0
Double decoding: "Legacy" is the term that seems to be used for the old fashioned BIOS system of booting (it never had a real name). "CSM" is the name for the optional feature of UEFI firmware that can emulate legacy BIOS runtime features.
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