Re: [gentoo-user] Capture dmesg output on boot?
On Mon, 11 May 2009 20:16:55 -0400 Dan Cowsill danthe...@gmail.com wrote: Hello list, I've been trying to get to the bottom of my recent troubles with my IDE controller working with the 2.6.28 kernel. Now, linux never boots without a kernel panic, so dmesg never gets logged... Is there any way to have the kernel dump the boot log somewhere? I'd settle for scrolling up, really. Thanks, Dan Add panic=X to your kernel parameters and after panic it will wait for X seconds before rebooting. -- Best regards, Daniel
Re: [gentoo-user] Capture dmesg output on boot?
On Tuesday 12 May 2009 01:28:17 Dan Cowsill wrote: Seeing the output isn't the problem, its just that the relevant error messages scroll away too quickly. Have you tried CTRL-S to pause the output and CTRL-Q to resume? -- Rgds Peter
Re: [gentoo-user] Capture dmesg output on boot?
Peter Humphrey wrote: On Tuesday 12 May 2009 01:28:17 Dan Cowsill wrote: Seeing the output isn't the problem, its just that the relevant error messages scroll away too quickly. Have you tried CTRL-S to pause the output and CTRL-Q to resume? Or maybe the scroll lock key? That works on mine. Dale :-) :-)
Re: [gentoo-user] Capture dmesg output on boot?
Hello again list, After having tried every suggested method of scrolling or pausing kernel output and failing, I decided to mess about with the kernel config a little more and eventually came out ahead. I am happy to report no kernel panics and I thank everyone for their contribution. D signature.asc Description: OpenPGP digital signature
Re: [gentoo-user] Capture dmesg output on boot?
On Mon, 11 May 2009 17:20:10 -0700 James Ausmus wrote: On Mon, May 11, 2009 at 5:16 PM, Dan Cowsill danthe...@gmail.com wrote: Hello list, I've been trying to get to the bottom of my recent troubles with my IDE controller working with the 2.6.28 kernel. Now, linux never boots without a kernel panic, so dmesg never gets logged... Is there any way to have the kernel dump the boot log somewhere? I'd settle for scrolling up, really. If you have a serial port, you can enable serial console in the kernel config, and boot with a console=ttyS0 kernel parameter, to see all the output on a serially attached (via null modem cable or adapter) computer... -James An alternative to the serial port is your ethernet connection. The kernel can output to ethernet and you can capture the info using netconsole.
[gentoo-user] Capture dmesg output on boot?
Hello list, I've been trying to get to the bottom of my recent troubles with my IDE controller working with the 2.6.28 kernel. Now, linux never boots without a kernel panic, so dmesg never gets logged... Is there any way to have the kernel dump the boot log somewhere? I'd settle for scrolling up, really. Thanks, Dan signature.asc Description: OpenPGP digital signature
Re: [gentoo-user] Capture dmesg output on boot?
On Mon, May 11, 2009 at 5:16 PM, Dan Cowsill danthe...@gmail.com wrote: Hello list, I've been trying to get to the bottom of my recent troubles with my IDE controller working with the 2.6.28 kernel. Now, linux never boots without a kernel panic, so dmesg never gets logged... Is there any way to have the kernel dump the boot log somewhere? I'd settle for scrolling up, really. If you have a serial port, you can enable serial console in the kernel config, and boot with a console=ttyS0 kernel parameter, to see all the output on a serially attached (via null modem cable or adapter) computer... -James
Re: [gentoo-user] Capture dmesg output on boot?
James Ausmus wrote: If you have a serial port, you can enable serial console in the kernel config, and boot with a console=ttyS0 kernel parameter, to see all the output on a serially attached (via null modem cable or adapter) computer... -James Hey, thanks for the advice. Would that allow me to scroll the output? Seeing the output isn't the problem, its just that the relevant error messages scroll away too quickly. Thanks, D signature.asc Description: OpenPGP digital signature
RE: [gentoo-user] Capture dmesg output on boot?
I've been trying to get to the bottom of my recent troubles with my IDE controller working with the 2.6.28 kernel. Now, linux never boots without a kernel panic, so dmesg never gets logged... Is there any way to have the kernel dump the boot log somewhere? I'd settle for scrolling up, really. Have you tried shift+PgUp ? I have no idea if it will work in that circumtance... Remember that depending how you setup the kernel the IDE devices could be hdX or sdX.
Re: [gentoo-user] Capture dmesg output on boot?
Adam Carter wrote: Have you tried shift+PgUp ? I have no idea if it will work in that circumtance... Remember that depending how you setup the kernel the IDE devices could be hdX or sdX. Thanks, Yes, I've tried shift+pgUp and it doesn't appear to work. And yes, I've verified that my root argument is the proper notation. D signature.asc Description: OpenPGP digital signature
Re: [gentoo-user] Capture dmesg output on boot?
Dan Cowsill wrote: Adam Carter wrote: Have you tried shift+PgUp ? I have no idea if it will work in that circumtance... Remember that depending how you setup the kernel the IDE devices could be hdX or sdX. Thanks, Yes, I've tried shift+pgUp and it doesn't appear to work. And yes, I've verified that my root argument is the proper notation. D I had similar problem in the past when the livecd would boot on hda but once I booted into the new kernel I had to set fstab to sda. As far as saving the messages during boot, there is a kernel parameter that allows for scrolling the messages but only after the hd is mounted. This is too late for checking kernel panic messages for example. -- Valmor
