Red HatThis forum is for the discussion of Red Hat Linux.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
Please help!! I have just bought a brand new HP/Compaq nx7400 laptop running RHEL 4 and when I unplug the power to run on battery it just craps out. This happens every time when the power state changes - from battery to wall or from wall to battery.
I have tried to add in "acpi=off noacpi" in the /boot/grub/menu.lst file, but when I updated the newest release of the kernel, I was back to square one.
Lenard, thanks for the reply! The switches were added as suggested by a RH engineer and seemed to have work where the system was not locking up. The kernel release was 2.6.9-42.0.8. However, when I updated the kernel to 2.6.9-42.0.10, I was back to the same issue - system locks up.
Just to test if it's an issue with the kernel or not, I unplugged the power before the kernel boot and after. It seems the system would lock up when the kernel was booting. And I am also not able to ping the machine when it freezes.
Distribution: RHEL/CentOS/SL 5 i386 and x86_64 pata for IDE in use
Posts: 4,790
Rep:
Thoughts in no certain order........
Check for a BIOS update, the laptop should not freeze when the AC adapter is unplugged or inserted.
You could wait until the 14th also (rumor has it that's when RHEL5 will be released) then try upgrading.
You could build your own custom kernel, support for newer hardware is not that great in the RHEL-4 kernel family. Which is not unexpected as Red Hat aims for stability and not towards leading/bleeding edge.
HP is fairly good at Linux support, you might want to check if they have support for RHEL-4u4 for your laptop.
Try using SysRq M, P, t when systme locaks up. This will log the system state when it locks up in /var/log/messages. To enable sysrq run below command :
# echo 1 > /proc/sys/kernel/sysrq
Looking at messages file might help but its really hard to read this info.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.