[gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Roy Wright]

Howdy,

Recently upgraded to kde 4.2.1 and noticed that lancelot is reported by 
top as 100% cpu.  Looking at system monitor - cpu settings plasmoid, it 
looks like 2 of the cores (quad core cpu) are optioning off at 100%.

I'm curious if anyone else is seeing something similar?

TIA,
Roy

Re: [gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Alan McKinnon]

On Saturday 07 March 2009 09:03:30 Roy Wright wrote:
> Howdy,
>
> Recently upgraded to kde 4.2.1 and noticed that lancelot is reported by
> top as 100% cpu.  Looking at system monitor - cpu settings plasmoid, it
> looks like 2 of the cores (quad core cpu) are optioning off at 100%.
>
> I'm curious if anyone else is seeing something similar?

Hi Roy,

By your wording I'd assume that Lancelot was fine with version 4.2.0? Are you 
having trouble with any other plasmoids? I get similar behaviour with some of 
the eye-candy compiz-style plugins, but Lancelot itself is solid (and vastly 
superior to that default menu thing).

It's unlikely to be plasma itself, I see very little reports about that. It's 
more likely to be X related or drivers or some such.

Please post back with details of your hardware, drivers, kde USE settings etc 
etc 

-- 
alan dot mckinnon at gmail dot com

Re: [gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Roy Wright]

Alan McKinnon wrote:
> On Saturday 07 March 2009 09:03:30 Roy Wright wrote:
>> Howdy,
>>
>> Recently upgraded to kde 4.2.1 and noticed that lancelot is reported by
>> top as 100% cpu.  Looking at system monitor - cpu settings plasmoid, it
>> looks like 2 of the cores (quad core cpu) are optioning off at 100%.
>>
>> I'm curious if anyone else is seeing something similar?
> 
> Hi Roy,
> 
> By your wording I'd assume that Lancelot was fine with version 4.2.0? Are you 
> having trouble with any other plasmoids? I get similar behaviour with some of 
> the eye-candy compiz-style plugins, but Lancelot itself is solid (and vastly 
> superior to that default menu thing).
> 
> It's unlikely to be plasma itself, I see very little reports about that. It's 
> more likely to be X related or drivers or some such.
> 
> Please post back with details of your hardware, drivers, kde USE settings etc 
> etc 
> 

Yes, no issues with kde 4.2.0.  What happened is I'd upgraded to the bad 
nvidia-drivers-180.35, downgraded to 180.29, then upgraded kde from 
4.2.0 to 4.2.1.  One weird side-effect of the 4.2.1 upgrade is that I 
lost my plasma desktop layout.  No biggy, I just added the plasmoids 
back.  Then I noticed the lancelot cpu usage issue.  I have not noticed 
any behavior problems.  Kde 4.2 has been rock solid.

~x86 system

emerge --info at http://pastebin.com/m6914fe90 (1 month duration)

lshw at http://pastebin.com/m5a355800 (1 month duration)

All I can think to try is to move my ~/.kde4.2 directory and let it 
regenerate.

Thank you,
Roy

Re: [gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Alan McKinnon]

On Saturday 07 March 2009 10:12:42 Roy Wright wrote:


> Yes, no issues with kde 4.2.0.  What happened is I'd upgraded to the bad
> nvidia-drivers-180.35, downgraded to 180.29, then upgraded kde from
> 4.2.0 to 4.2.1.  One weird side-effect of the 4.2.1 upgrade is that I
> lost my plasma desktop layout.  No biggy, I just added the plasmoids
> back.  Then I noticed the lancelot cpu usage issue.  I have not noticed
> any behavior problems.  Kde 4.2 has been rock solid.

I followed the exact same steps (even the nvidia upgrade-downgrade cycle) on 
my notebook with no problems whatsoever. The only difference is I have ~amd64

> ~x86 system
>
> emerge --info at http://pastebin.com/m6914fe90 (1 month duration)
>
> lshw at http://pastebin.com/m5a355800 (1 month duration)
>
> All I can think to try is to move my ~/.kde4.2 directory and let it
> regenerate.

That's a good quick easy check. At least we'll know if it's a code or a config 
issue

-- 
alan dot mckinnon at gmail dot com

Re: [gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Roy Wright]

Alan McKinnon wrote:
> On Saturday 07 March 2009 10:12:42 Roy Wright wrote:
> 
> 
>> Yes, no issues with kde 4.2.0.  What happened is I'd upgraded to the bad
>> nvidia-drivers-180.35, downgraded to 180.29, then upgraded kde from
>> 4.2.0 to 4.2.1.  One weird side-effect of the 4.2.1 upgrade is that I
>> lost my plasma desktop layout.  No biggy, I just added the plasmoids
>> back.  Then I noticed the lancelot cpu usage issue.  I have not noticed
>> any behavior problems.  Kde 4.2 has been rock solid.
> 
> I followed the exact same steps (even the nvidia upgrade-downgrade cycle) on 
> my notebook with no problems whatsoever. The only difference is I have ~amd64
> 
>> ~x86 system
>>
>> emerge --info at http://pastebin.com/m6914fe90 (1 month duration)
>>
>> lshw at http://pastebin.com/m5a355800 (1 month duration)
>>
>> All I can think to try is to move my ~/.kde4.2 directory and let it
>> regenerate.
> 
> That's a good quick easy check. At least we'll know if it's a code or a config 
> issue
> 

Looks like it was a config type issue with something in ~/.kde4.2.

Thank you for helping me work thru it.

Roy

Re: [gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Volker Armin Hemmann]

On Samstag 07 März 2009, Roy Wright wrote:
> Howdy,
>
> Recently upgraded to kde 4.2.1 and noticed that lancelot is reported by
> top as 100% cpu.  Looking at system monitor - cpu settings plasmoid, it
> looks like 2 of the cores (quad core cpu) are optioning off at 100%.
>
> I'm curious if anyone else is seeing something similar?
>
> TIA,
> Roy

which qt version are you using?

Re: [gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Roy Wright]

Volker Armin Hemmann wrote:
> On Samstag 07 März 2009, Roy Wright wrote:
>> Howdy,
>>
>> Recently upgraded to kde 4.2.1 and noticed that lancelot is reported by
>> top as 100% cpu.  Looking at system monitor - cpu settings plasmoid, it
>> looks like 2 of the cores (quad core cpu) are optioning off at 100%.
>>
>> I'm curious if anyone else is seeing something similar?
>>
>> TIA,
>> Roy
> 
> which qt version are you using?
> 
> 


Wow, that's interesting:  qt-3.3.8b-r1

Nothing is masking qt4, and both qt3 and qt4 USE flags are set, but 
apparently nothing is pulling qt4 in...

I was under the impression that kde4 required qt4.

Thank you,
Roy

Re: [gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Volker Armin Hemmann]

On Samstag 07 März 2009, Roy Wright wrote:
> Volker Armin Hemmann wrote:
> > On Samstag 07 März 2009, Roy Wright wrote:
> >> Howdy,
> >>
> >> Recently upgraded to kde 4.2.1 and noticed that lancelot is reported by
> >> top as 100% cpu.  Looking at system monitor - cpu settings plasmoid, it
> >> looks like 2 of the cores (quad core cpu) are optioning off at 100%.
> >>
> >> I'm curious if anyone else is seeing something similar?
> >>
> >> TIA,
> >> Roy
> >
> > which qt version are you using?
>
> Wow, that's interesting:  qt-3.3.8b-r1
>
> Nothing is masking qt4, and both qt3 and qt4 USE flags are set, but
> apparently nothing is pulling qt4 in...
>
> I was under the impression that kde4 required qt4.

yes it does. How have you checked which qt versions are installed? qt-3.3.8 
and 4.4 or 4.5 can happily exist next to each other. Have a look into 
/var/db/pkg and check which qt versions you have.

With kde 4.2.1 you should use 4.5 really - you should....

Re: [gentoo-user] KDE 4.2.1 lancelot using 100% of a core

[Roy Wright]

Volker Armin Hemmann wrote:
> On Samstag 07 März 2009, Roy Wright wrote:
>> Volker Armin Hemmann wrote:
>>> which qt version are you using?
>> Wow, that's interesting:  qt-3.3.8b-r1
>>
>> Nothing is masking qt4, and both qt3 and qt4 USE flags are set, but
>> apparently nothing is pulling qt4 in...
>>
>> I was under the impression that kde4 required qt4.
> 
> yes it does. How have you checked which qt versions are installed? qt-3.3.8 
> and 4.4 or 4.5 can happily exist next to each other. Have a look into 
> /var/db/pkg and check which qt versions you have.
> 
> With kde 4.2.1 you should use 4.5 really - you should....

OK, I think I've figured out the qt issue.  In a nutshell, it's not an 
issue.  I was checking the version of x11-libs/qt which is what reported 
only 3.3.8 being installed.  But when I look for all qt-* packages I 
find that version 4.5 of them are installed.  So not understanding why 
there apparently wasn't a dependency on x11-libs/qt, I went ahead and 
emerged it.  The merge note said that this was a meta package that was 
going away in the future.  Light bulb illuminates.  The qt4 USE flag was 
pulling in the qt-*:4 packages, just not the meta package.

Thank you,
Roy