If you can configure a serial console, you would be able to read those
messages. But I still say it's a process in an uninterrruptable sleep
which means the kernel can't kill it during a normal shutdown. That, in
turn, implies that it is a kernel bug in a device driver. In fact, I
will wager it's the driver for your sound card and the process that is
in an uninterruptable sleep is pulse. That's just a guess though.
If the machine is kind of old, it is very likely to have a serial port.
Then you need another computer and a null modem cable to configure a
serial console. There is a really good serial console howto on the web.
No point in me reiterating all that. If you have never configured a
serial console before, you are not likely to have a null modem cable
lying around. But setting up a serial console is a valuable skill for a
blind linux sysadmin to have. You can even do a serial console install
of VMware ESXI.
PS: Thanks for the tip on tap tap see. I'd never heard of it before. I
am going to try it today. When I need to have a screen read to me by my
phone, I have been using the knfbReader app.
On 07/03/2016 01:08 PM, Mark Peveto wrote:
I've been working on this more today, pulling out all the tools I've got. To the point i'm using tap tap see to try and get an idea of what's on my screen when reboot hangs. The most i can
get is a message about bus socket display, and a command prompt.
Not real helpful, but I guess it's a start.
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
_______________________________________________
Blinux-list mailing list
Blinux-list@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/blinux-list