Re: F13: Delay in screen refresh

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 31 May 2010 09:02, Marco Guazzone <marco.guazzone@xxxxxxxxx> wrote:
> On Sat, May 29, 2010 at 3:06 PM, Marco Guazzone
> <marco.guazzone@xxxxxxxxx> wrote:
>> Hi,
>>
>> I've noticed that there is a some kind of "delay" in the screen refresh.
>> For instance, under VIM when I move the cursor (that is a black
>> rectangle) under a character,  it takes between 1 and 4 secs before
>> the character appears inside the cursor.
>> I've experienced the same issue under OpenOffice and FireFox.
>> This is really annoying. :(
>>
>> Under F12 no problem
>>
>> Does any other experienced this behaviour?
>>
>> My system is:
>> * OS: F13 x86_64 - up-to-dated
>> * WM: OpenBox
>> * CPU: Intel Core 2 Duo
>> * GPU: Intel GM965/GL960
>> * RAM: 2GB
>>
>> Thank you so much!
>
> Hi!
>
> It seems that this problem is only affecting me.
>
> In the meanwhile I've noticed that this delay seems to be really X
> dependent, since almost every applications exhibits it.
> For instance, I've tried with:
> * bash inside xterm (e.g., execute "ls" and then move up with Shift+PgUp)
> * gvim
> ...
>
> Please, can anyone help me?
>
> Thank you very much!!
>
> Cheers,
>
> -- Marco

Hi Marco,

I'm no expert but it sound to me like you have a latency issue.  For
some reason your machine is sometimes having to wait 1 to 4 seconds
before it can give a program (vim, bash, etc.) its CPU time slice,
hence the apparent delay.

I have seen this kind of thing before when the kernel has to re-try
disk I/O multiple times on a failing hard drive.

Suggestions:
1) Play music!  If it pauses when your app pauses it is an OS wide
issue effecting everything.
2) Run top in another window.  When top refreshes after the pause does
any process jump to the top?
3) Check /var/log/messages for any errors.

Vague ideas:
4) Google for investigating latency issues.
5) With modern kernels I guess it should be possible to dynamically
trace it to find the lateny issue, but I have no idea how.

Sorry I can't be more help,
Mike
-- 
users mailing list
users@xxxxxxxxxxxxxxxxxxxxxxx
To unsubscribe or change subscription options:
https://admin.fedoraproject.org/mailman/listinfo/users
Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines


[Index of Archives]     [Older Fedora Users]     [Fedora Announce]     [Fedora Package Announce]     [EPEL Announce]     [EPEL Devel]     [Fedora Magazine]     [Fedora Summer Coding]     [Fedora Laptop]     [Fedora Cloud]     [Fedora Advisory Board]     [Fedora Education]     [Fedora Security]     [Fedora Scitech]     [Fedora Robotics]     [Fedora Infrastructure]     [Fedora Websites]     [Anaconda Devel]     [Fedora Devel Java]     [Fedora Desktop]     [Fedora Fonts]     [Fedora Marketing]     [Fedora Management Tools]     [Fedora Mentors]     [Fedora Package Review]     [Fedora R Devel]     [Fedora PHP Devel]     [Kickstart]     [Fedora Music]     [Fedora Packaging]     [Fedora SELinux]     [Fedora Legal]     [Fedora Kernel]     [Fedora OCaml]     [Coolkey]     [Virtualization Tools]     [ET Management Tools]     [Yum Users]     [Yosemite News]     [Gnome Users]     [KDE Users]     [Fedora Art]     [Fedora Docs]     [Fedora Sparc]     [Libvirt Users]     [Fedora ARM]

  Powered by Linux