I don't really know how old the machine is. It was given to me. I'll check those logs and see what I find out. Mark Peveto Registered Linux user number 600552 Sent from sonar using alpine 2.20.13 On Sat, 2 Jul 2016, Tony Baechler wrote: > On 7/2/2016 1:54 AM, Mark Peveto wrote: > > The short version of a long story. I've just installed sonar on a dell pc. > > I've also got it installed on a compaq/hp machine, where the followig > > problem doesn't exist. On the dell, sudo reboot seems to hang. Sudo > > shutdown works fine. I've tried sudo shutdown -r now, sudo systemctl > > reboot, and > > other options. How, without sighted help, can I find out what's causing > > this machine to hang when I reboot. What's strange is this...why does it > > shut > > down just fine, but not reboot? > > I'm not familiar with Sonar, so consider these random guesses. First, have you > looked in /var/log/syslog and kern.log? There might be a process not shutting > down properly. If you halt the system, all processes are killed and all > filesystems are unmounted. A reboot only resets the system, so I suppose it's > possible that a process is behaving badly or the kernel can't unmount a > filesystem. I see this sometimes with slow USB devices, like if I copy a ton > of files to my SD card. A more likely explanation is an ACPI or power > management issue. You didn't say how old the machines are, but it could be a > BIOS bug. Recent kernels should work around this. Without knowing the age of > the machine and the kernel version, I can only guess. > > Also, the machine isn't a laptop, right? Laptops usually have power management > issues. On Debian, there is a package called acpi-tools. Try installing it if > it isn't there or purging it if it's there. I have better luck without it > installed. I would bet syslog and kern.log would have clues to your problem. I > would check those first. Make note of the time you reboot the machine and look > at those files with less. You could try booting a live CD to avoid adding all > of the boot messages to the logs. You didn't say if that happens on a live CD, > booting from the hard drive, other distros, etc. I''ve noticed most live CDs > have strange shutdown problems. You might have to pass a parameter on the > kernel command line. Both HP and Dell have issues with Linux. > > -- > Tony Baechler, founder, Baechler Access Technology Services > Putting accessibility at the forefront of technology > mailto:bats@xxxxxxxxxxxxxx > Phone: 1-619-746-8310 SMS text: 1-619-375-2545 > > _______________________________________________ > Blinux-list mailing list > Blinux-list@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/blinux-list > _______________________________________________ Blinux-list mailing list Blinux-list@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/blinux-list