Re: Freezing

Thanks Leopoldo. Hope we can gather before too long. I will keep a 
written journal of any freezes.

Brian

On 6/10/20 9:53 AM, Leopoldo Macias wrote:
>
> Brian,
>
> Sounds like a plan. Until we meet, try to jot down when (and if) you 
> laptop hangs again. It will help in troubleshooting if it turns out to 
> be a chronic issue and if there's a pattern to when the laptop hangs 
> (it could lead us to cron jobs if it's a consistent pattern). If 
> there's not a pattern, then we can look at hardware logs.
>
>
> On 6/10/20 9:37 AM, Brian O'Keefe wrote:
>>
>> Thanks for the info Leopoldo. I ran the command and there is a lot of 
>> info! I didn't update swap but I did notice in the log that swap was 
>> increased to the 2+GB so that doesn't seem an issue. I did find many 
>> lines errors but they seem ubiquitous as the machine powers up. I 
>> only found one line in yesterday's log that was a kill command. 
>> Perhaps that's my doing a hard shutdown.
>>
>> Anyway, too much in the logs for me. Perhaps when we can meet 
>> physically again I can get some help looking at the logs and figure 
>> it out. Fortunately I pretty much stick to simple apps these days (of 
>> retirement) and so I don't get in trouble when the machine hangs.
>>
>> Muchas Gracias
>>
>> Brian
>>
>> On 6/7/20 11:49 PM, Leopoldo Macias wrote:
>>>
>>> I agree with Akkana.. look for the cause,
>>>
>>> If your system froze, try running the journalctl command (there's 
>>> lots of data in that). You can filter the data in many ways so as 
>>> not to get overwhelmed. For example:
>>>
>>> To view the kernel logs (which might have clues to a crash or hang)
>>> journalctl -rk
>>>
>>> the (-r) will print the log in reverse order (meaning newest logs 
>>> show up first)
>>>
>>> the (-k) will only show logs for the kernel (you can choose many 
>>> different logs to display with other options)
>>>
>>> You can scroll down through the logs or type the colon (shift+;) and 
>>> q to quit the log.
>>>
>>> Here is a link for helpful journalctl commands:
>>>
>>> https://www.thegeekdiary.com/6-useful-journalctl-command-examples-in-centos-rhel-7-cheat-sheet/
>>>
>>> I tried it on my ubuntu20.04 and I did not have to use sudo to run 
>>> the 'journalctl' commands.
>>>
>>> Usually if a process hung it will be recorded in the kernel logs and 
>>> that give a path to follow. Also, has this happened multiple times 
>>> prior to the swap update? or did occur only once?
>>>
>>>
>>>
>>> On 6/7/20 11:29 AM, Brian O'Keefe wrote:
>>>>
>>>> Thanks Akkana
>>>>
>>>> Yeah, can't check much when frozen. I've looked at dmesg but too 
>>>> much in there that I don't understand. I'll come running for help 
>>>> if this gets worse. It's usually only every couple of days. I do 
>>>> put the machine to sleep a lot. Maybe I need to shut down daily or 
>>>> some such,
>>>>
>>>> Best
>>>>
>>>> Brian
>>>>
>>>> On 6/7/20 11:07 AM, Akkana Peck wrote:
>>>>> Brian O'Keefe writes:
>>>>>>     I am loathe to increase the swap memory when it doesn't appear to be a
>>>>>>     problem according to System Monitor.
>>>>> This. I've seen a lot of discussion about swap, but if there was any
>>>>> evidence that swap was the problem, I missed it. If adding swap is
>>>>> going to be this hard, maybe put the effort instead into diagnosing
>>>>> why the system is freezing?
>>>>>
>>>>> For instance, do you know if it's X or the kernel that's freezing?
>>>>> It would be interesting to try to ssh in from another machine,
>>>>> to see if maybe the machine is up but X is locked.
>>>>>
>>>>> Diagnosing a freeze isn't all that easy, because of course if the
>>>>> kernel is hung, then the system has no way to note what went wrong.
>>>>> But sometimes you can find out what was happening just before it
>>>>> froze. Here's a Google search that gives some starting points:
>>>>>
>>>>> https://www.google.com/search?client=ubuntu&channel=fs&q=diagnose+why+linux+freezing&ie=utf-8&oe=utf-8
>>>>>
>>>>>          ...Akkana
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