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Questions tagged [troubleshooting]
142 questions
25
votes
9 answers
Internal microphone not working
I have an internal microphone in my laptop. I think it uses Intel High Definition Audio. But I can't get it to work with Ubuntu. It doesn't work with either the Sound Recorder or Skype.
On the Input tab in 'Sound Preferences', I just see Internal…
User
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19
votes
10 answers
Can I simulate a slow hard drive?
I have hunch that a certain intermittent bug might only manifest itself when there is a slow disk read rate. Troubleshooting is difficult because I can't reliably reproduce it.
Short of simply gobbling IO with a high priority process, is there any…
ændrük
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15
votes
10 answers
How to fix blank screen with mouse pointer on Ubuntu install reboot?
I am trying to re-purpose my Dell Inspiron 8600 with Ubuntu 14.04 to be used as a low scale HTPC.
Here is what I have done so far.
I have created a live USB for installation. I had to force pae to get the installation to work.
The entire…
Jason
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8
votes
1 answer
I have 4 bad sectors on my hard disk, should I be worried?
I use Ubuntu 14.04 LTS. Here are some screenshots that depict the condition of my hard drive. It shows that my hard drive has 4 bad sectors. Is this something to worry about? Is there any way to solve this problem?
akshay
- 149
- 2
- 9
8
votes
1 answer
Troubleshooting a sudden shutdown
Yesterday my computer suddenly powered down, without warning or going through the normal shutdown procedure.
I know it wasn't a powercut because everything else in the house stayed on. This is the first time it has happened, and it turned on again…
thomasmichaelwallace
- 2,649
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8
votes
1 answer
How to determine what happened and locate the problem when my system freezes?
Hello I had some freezes with my desktop. It is Lucid 10.04 on a Lenovo 3000 N200. System freezes completely.
How can I locate the problem?
vrcmr
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7
votes
3 answers
Ubuntu won't suspend anymore, but it did upon install
I fresh installed Ubuntu 10.10 back when it came out, and my laptop was suspending fine. All of a sudden, I can't get my laptop to suspend anymore. It's an HP Pavilion dv2-1110, but I don't think it's a hardware issue, here's why:
It suspended fine…
Malabarba
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7
votes
1 answer
How can I find out which programs have modified a file over some period of time?
I'd like to better understand which programs are modifying a specific file1 during a reboot. Can I set something up to log this kind of information?
Polling for which processes currently have the file open won't work, as the file may only be open…
ændrük
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- 74
- 233
- 365
7
votes
1 answer
Kernel Panic Troubleshooting For Dummies
I have made Ubuntu my primary OS since 10.04, and I have converted many of my friends and neighbors into Ubuntu users since then. I am the fix-it guy they approach when they encounter problems. The most frantic calls I get are when they encounter an…
Sid
- 10,503
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7
votes
1 answer
How do you diagnose constant crashing issues?
My recent installation 10.10 on my laptop keeps freezing/crashing on start-up after working perfectly for one day.
The system just freezes, like a screnshot, and a restart is required. It happens directly after login or just as any application is…
Rick
- 185
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6
votes
2 answers
Unable to enumerate USB device
My syslog is constantly filled with messages like this:
Oct 16 11:48:35 my-laptop kernel: [61470.980078] hub 1-0:1.0: unable to enumerate USB device on port 2
Oct 16 11:48:35 my-laptop kernel: [61471.192079] hub 3-0:1.0: unable to enumerate USB…
takeshin
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6
votes
3 answers
How can I troubleshoot `apt-get update` giving Hash Sum mismatch
When I run apt-get update I get in the end
Fetched 22.4 MB in 4s (4,659 kB/s)
W: Failed to fetch http://192.168.1.11/ubuntu/dists/utopic/main/binary-amd64/Packages Hash Sum mismatch
W: Failed to fetch…
skyking
- 383
- 3
- 11
6
votes
2 answers
How to detect error in cron jobs
The reasons why a cron job may fail is really very large. Most common reasons may be,
Syntax error
Using executable without proper path
Using a shell variable which is not defined in cron environment
Attempt to open a GUI without specifying…
sourav c.
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6
votes
2 answers
Diagnose brightness control
Brightness control on my laptop does not work, how can I diagnose if it's unsupported, or a bug? And if it is a bug, what do I include in the bug report?
UPDATE
Thank you for all the responses, specially @Guandalino for the bounty. But unfortunately…
Oxwivi
- 17,589
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6
votes
5 answers
How can I type the "at" @ symbol on a Spanish keyboard?
I just finished installing Ubuntu on my AMD Athlon, but I cannot type the "at" sign. I'm from Peru and my Keyboard is Spanish. I have tried using Alt+64, Ctrl+Alt+2, Ctrl+Alt+Q, but nothing happens.
Please help.
Radwulf
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