Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Olivier Ripoll]

On 20.05.2012 11:14, Rashif Ray Rahman wrote:


So, I finally managed to track down a peculiarity.

On Windows (7), there is no scrolling issue with the keyboard, or the
mouse scroll wheel (or touchpad vertical scroll). However, there is
lag if I use the scroll bar (by dragging with the mouse).

[...]

Hi,

That looks a lot like what I'm seeing since 2.0.2.

www.lyx.org/trac/ticket/8135

Could you try LyX 2.0.1 on Windows and see if you smooth scrolling by 
dragging the scrollbar is working with it ?


Thanks,

Olivier

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Ray Rashif]

On 22 May 2012 23:13, Olivier Ripoll durocortorum73-gm...@yahoo.fr wrote:
 On 20.05.2012 11:14, Rashif Ray Rahman wrote:

 So, I finally managed to track down a peculiarity.

 On Windows (7), there is no scrolling issue with the keyboard, or the
 mouse scroll wheel (or touchpad vertical scroll). However, there is
 lag if I use the scroll bar (by dragging with the mouse).

 [...]

 Hi,

 That looks a lot like what I'm seeing since 2.0.2.

 www.lyx.org/trac/ticket/8135

 Could you try LyX 2.0.1 on Windows and see if you smooth scrolling by
 dragging the scrollbar is working with it ?

I had noticed that bug report before, and I tried my luck on Linux by
installing 2.0.1, but it did not help. I will try it on Windows,
although it does appear to me as if the only problem in Windows is
that of scrolling with the scrollbar. Nothing else is a problem there.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Olivier Ripoll]

On 20.05.2012 11:14, Rashif Ray Rahman wrote:


So, I finally managed to track down a peculiarity.

On Windows (7), there is no scrolling issue with the keyboard, or the
mouse scroll wheel (or touchpad vertical scroll). However, there is
lag if I use the scroll bar (by dragging with the mouse).

[...]

Hi,

That looks a lot like what I'm seeing since 2.0.2.

www.lyx.org/trac/ticket/8135

Could you try LyX 2.0.1 on Windows and see if you smooth scrolling by 
dragging the scrollbar is working with it ?


Thanks,

Olivier

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Ray Rashif]

On 22 May 2012 23:13, Olivier Ripoll durocortorum73-gm...@yahoo.fr wrote:
 On 20.05.2012 11:14, Rashif Ray Rahman wrote:

 So, I finally managed to track down a peculiarity.

 On Windows (7), there is no scrolling issue with the keyboard, or the
 mouse scroll wheel (or touchpad vertical scroll). However, there is
 lag if I use the scroll bar (by dragging with the mouse).

 [...]

 Hi,

 That looks a lot like what I'm seeing since 2.0.2.

 www.lyx.org/trac/ticket/8135

 Could you try LyX 2.0.1 on Windows and see if you smooth scrolling by
 dragging the scrollbar is working with it ?

I had noticed that bug report before, and I tried my luck on Linux by
installing 2.0.1, but it did not help. I will try it on Windows,
although it does appear to me as if the only problem in Windows is
that of scrolling with the scrollbar. Nothing else is a problem there.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Olivier Ripoll]

On 20.05.2012 11:14, Rashif Ray Rahman wrote:


So, I finally managed to track down a peculiarity.

On Windows (7), there is no scrolling issue with the keyboard, or the
mouse scroll wheel (or touchpad vertical scroll). However, there is
lag if I use the scroll bar (by dragging with the mouse).

[...]

Hi,

That looks a lot like what I'm seeing since 2.0.2.

www.lyx.org/trac/ticket/8135

Could you try LyX 2.0.1 on Windows and see if you smooth scrolling by 
dragging the scrollbar is working with it ?


Thanks,

Olivier

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Ray Rashif]

On 22 May 2012 23:13, Olivier Ripoll  wrote:
> On 20.05.2012 11:14, Rashif Ray Rahman wrote:
>
>> So, I finally managed to track down a peculiarity.
>>
>> On Windows (7), there is no scrolling issue with the keyboard, or the
>> mouse scroll wheel (or touchpad vertical scroll). However, there is
>> lag if I use the scroll bar (by dragging with the mouse).
>
> [...]
>
> Hi,
>
> That looks a lot like what I'm seeing since 2.0.2.
>
> www.lyx.org/trac/ticket/8135
>
> Could you try LyX 2.0.1 on Windows and see if you smooth scrolling by
> dragging the scrollbar is working with it ?

I had noticed that bug report before, and I tried my luck on Linux by
installing 2.0.1, but it did not help. I will try it on Windows,
although it does appear to me as if the only problem in Windows is
that of scrolling with the scrollbar. Nothing else is a problem there.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 10 May 2012 14:05, Rashif Ray Rahman sc...@archlinux.org wrote:
 On 5 May 2012 16:56, Wolfgang Engelmann engelm...@uni-tuebingen.de wrote:
 Is scrolling still slow if you save your file under another name and use
 that?

 Yes.

 Is scrolling still slow if you take out your inserts (figures, notes)

 Yep.

 Is scrolling still slow if you take out the bibtex generated bibliography
 at the end of your document?

 There was no generated bibliography to begin with, so yes.

So, I finally managed to track down a peculiarity.

On Windows (7), there is no scrolling issue with the keyboard, or the
mouse scroll wheel (or touchpad vertical scroll). However, there is
lag if I use the scroll bar (by dragging with the mouse).

On Linux, if I start LyX using a desktop file, I cannot seem to scroll
at all (keyboard). This is the initial problem I was reporting, where
the cursor appears to be stuck and won't move at all, and sometimes
it may move a character or two after holding a direction for some
time.

If I start it from the commandline, however, scrolling works, albeit
in a crippled way. If for example I'm highlighting with SHIFT, it
slows to a crawl. This is not exhibited in Windows. Scrolling with
mouse wheel works good as in Windows, and scrolling with the scroll
bar is laggy as well.

So the common behaviour is scrolling with mouse wheel (OK) and
scrolling with scroll bar (slow). Linux-specific issue is no keyboard
scrolling when starting outside of commandline, and slow response when
it does work.

I'm going to have to do some troubleshooting within our distribution
first to rule out any distribution-specific issue. All cases
reproduced with default splash file.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 10 May 2012 14:05, Rashif Ray Rahman sc...@archlinux.org wrote:
 On 5 May 2012 16:56, Wolfgang Engelmann engelm...@uni-tuebingen.de wrote:
 Is scrolling still slow if you save your file under another name and use
 that?

 Yes.

 Is scrolling still slow if you take out your inserts (figures, notes)

 Yep.

 Is scrolling still slow if you take out the bibtex generated bibliography
 at the end of your document?

 There was no generated bibliography to begin with, so yes.

So, I finally managed to track down a peculiarity.

On Windows (7), there is no scrolling issue with the keyboard, or the
mouse scroll wheel (or touchpad vertical scroll). However, there is
lag if I use the scroll bar (by dragging with the mouse).

On Linux, if I start LyX using a desktop file, I cannot seem to scroll
at all (keyboard). This is the initial problem I was reporting, where
the cursor appears to be stuck and won't move at all, and sometimes
it may move a character or two after holding a direction for some
time.

If I start it from the commandline, however, scrolling works, albeit
in a crippled way. If for example I'm highlighting with SHIFT, it
slows to a crawl. This is not exhibited in Windows. Scrolling with
mouse wheel works good as in Windows, and scrolling with the scroll
bar is laggy as well.

So the common behaviour is scrolling with mouse wheel (OK) and
scrolling with scroll bar (slow). Linux-specific issue is no keyboard
scrolling when starting outside of commandline, and slow response when
it does work.

I'm going to have to do some troubleshooting within our distribution
first to rule out any distribution-specific issue. All cases
reproduced with default splash file.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 10 May 2012 14:05, Rashif Ray Rahman  wrote:
> On 5 May 2012 16:56, Wolfgang Engelmann  wrote:
>> Is scrolling still slow if you save your file under another name and use
>> that?
>
> Yes.
>
>> Is scrolling still slow if you take out your inserts (figures, notes)
>
> Yep.
>
>> Is scrolling still slow if you take out the bibtex generated bibliography
>> at the end of your document?
>
> There was no generated bibliography to begin with, so yes.

So, I finally managed to track down a peculiarity.

On Windows (7), there is no scrolling issue with the keyboard, or the
mouse scroll wheel (or touchpad vertical scroll). However, there is
lag if I use the scroll bar (by dragging with the mouse).

On Linux, if I start LyX using a desktop file, I cannot seem to scroll
at all (keyboard). This is the initial problem I was reporting, where
the cursor appears to be "stuck" and won't move at all, and sometimes
it may move a character or two after holding a direction for some
time.

If I start it from the commandline, however, scrolling works, albeit
in a crippled way. If for example I'm highlighting with SHIFT, it
slows to a crawl. This is not exhibited in Windows. Scrolling with
mouse wheel works good as in Windows, and scrolling with the scroll
bar is laggy as well.

So the common behaviour is scrolling with mouse wheel (OK) and
scrolling with scroll bar (slow). Linux-specific issue is no keyboard
scrolling when starting outside of commandline, and slow response when
it does work.

I'm going to have to do some troubleshooting within our distribution
first to rule out any distribution-specific issue. All cases
reproduced with default splash file.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 5 May 2012 16:56, Wolfgang Engelmann engelm...@uni-tuebingen.de wrote:
 Is scrolling still slow if you save your file under another name and use
 that?

Yes.

 Is scrolling still slow if you take out your inserts (figures, notes)

Yep.

 Is scrolling still slow if you take out the bibtex generated bibliography
 at the end of your document?

There was no generated bibliography to begin with, so yes.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 5 May 2012 16:56, Wolfgang Engelmann engelm...@uni-tuebingen.de wrote:
 Is scrolling still slow if you save your file under another name and use
 that?

Yes.

 Is scrolling still slow if you take out your inserts (figures, notes)

Yep.

 Is scrolling still slow if you take out the bibtex generated bibliography
 at the end of your document?

There was no generated bibliography to begin with, so yes.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 5 May 2012 16:56, Wolfgang Engelmann  wrote:
> Is scrolling still slow if you save your file under another name and use
> that?

Yes.

> Is scrolling still slow if you take out your inserts (figures, notes)

Yep.

> Is scrolling still slow if you take out the bibtex generated bibliography
> at the end of your document?

There was no generated bibliography to begin with, so yes.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Wolfgang Engelmann]

Am Freitag, 4. Mai 2012, 09:07:36 schrieb Rashif Ray Rahman:
...
  So the bad news is, well, the scrolling is slow. The raster graphics
  system switch did not appear to help in my case. The bottomline is
  that if at least one other person cannot reproduce this (as in,
  scrolling works for you like it does in any other app in this world)
  then it is unlikely to be a LyX bug.
Is scrolling still slow if you save your file under another name and use 
that?

Is scrolling still slow if you take out your inserts (figures, notes)

Is scrolling still slow if you take out the bibtex generated bibliography 
at the end of your document?

Wolfgang

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Wolfgang Engelmann]

Am Freitag, 4. Mai 2012, 09:07:36 schrieb Rashif Ray Rahman:
...
  So the bad news is, well, the scrolling is slow. The raster graphics
  system switch did not appear to help in my case. The bottomline is
  that if at least one other person cannot reproduce this (as in,
  scrolling works for you like it does in any other app in this world)
  then it is unlikely to be a LyX bug.
Is scrolling still slow if you save your file under another name and use 
that?

Is scrolling still slow if you take out your inserts (figures, notes)

Is scrolling still slow if you take out the bibtex generated bibliography 
at the end of your document?

Wolfgang

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Wolfgang Engelmann]

Am Freitag, 4. Mai 2012, 09:07:36 schrieb Rashif Ray Rahman:
...
> >> So the bad news is, well, the scrolling is slow. The raster graphics
> >> system switch did not appear to help in my case. The bottomline is
> >> that if at least one other person cannot reproduce this (as in,
> >> scrolling works for you like it does in any other app in this world)
> >> then it is unlikely to be a LyX bug.
Is scrolling still slow if you save your file under another name and use 
that?

Is scrolling still slow if you take out your inserts (figures, notes)

Is scrolling still slow if you take out the bibtex generated bibliography 
at the end of your document?

Wolfgang

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On Thu, Apr 26, 2012 at 3:17 PM, Richard Heck rgheck at comcast.net wrote:

 On 04/26/2012 11:02 AM, David L. Johnson wrote:

 On 04/26/2012 10:30 AM, Rashif Ray Rahman wrote:

 Hi all

 I've not been a LyX user for long but am going to write a 300-page academic 
 paper with it for the final typesetting and formatting. I've practised on 
 and off for the past few months but one thing that has always troubled me 
 is how I'm unable to scroll with the keyboard (up and down arrow keys). I'd 
 like to be rid of the mouse if possible.

 When I hold a particular directional key for up to 20 secs it appears to 
 work but as if it's in slow motion. Qt shouldn't be having any such 
 scrolling problem, so I haven't been able to troubleshoot this any further.

 I don't see this behavior at all.  The only thing that slows down scrolling 
 with the arrows is if the cursor enters a math formula.  Then it runs 
 through all the superscripts and subscripts, but still it is reasonably fast.

 You also might try using the Pageup and Pagedown keys.

 What system are you using?  Mine is debian testing (a linux variant), on a 
 fast machine -- but it works well on even my slow netbook.

 There have been occasional reports of this kind of problem, usually 
 connected, as far as we can tell, to interactions issues between LyX and 
 certain video drivers. So I'll ask, too: What system is this and, if it's 
 Linux, what desktop, what window manager, what X drivers?

 Richard

Hey guys

I wasn't subscribed when I sent the first e-mail so this reply might
mess up a few things (using GMail so can't edit headers). And since
then there have been a number of replies.

Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
(GM45 Express Chipset; probably GMA 4500MHD gpu).

The good news is all of a sudden I do not see the stuck behaviour.
It does scroll, but awfully slowly. Both up down and sideways (I like
to read while holding down the right arrow key). There have been some
Intel driver and Mesa updates in the recent past, so it is possible
(though with a great level of uncertainty) they did something (good).

So the bad news is, well, the scrolling is slow. The raster graphics
system switch did not appear to help in my case. The bottomline is
that if at least one other person cannot reproduce this (as in,
scrolling works for you like it does in any other app in this world)
then it is unlikely to be a LyX bug.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 4 May 2012 14:18, Rashif Ray Rahman sc...@archlinux.org wrote:
 Hey guys

 I wasn't subscribed when I sent the first e-mail so this reply might
 mess up a few things (using GMail so can't edit headers). And since
 then there have been a number of replies.

 Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
 (GM45 Express Chipset; probably GMA 4500MHD gpu).

 The good news is all of a sudden I do not see the stuck behaviour.
 It does scroll, but awfully slowly. Both up down and sideways (I like
 to read while holding down the right arrow key). There have been some
 Intel driver and Mesa updates in the recent past, so it is possible
 (though with a great level of uncertainty) they did something (good).

 So the bad news is, well, the scrolling is slow. The raster graphics
 system switch did not appear to help in my case. The bottomline is
 that if at least one other person cannot reproduce this (as in,
 scrolling works for you like it does in any other app in this world)
 then it is unlikely to be a LyX bug.

And oh yes, I'm on KDE. But on my system it does not make a difference
what DE or WM I'm on, as I've reproduced this with E17 and Openbox.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 4 May 2012 14:35, Rashif Ray Rahman sc...@archlinux.org wrote:
 On 4 May 2012 14:18, Rashif Ray Rahman sc...@archlinux.org wrote:
 Hey guys

 I wasn't subscribed when I sent the first e-mail so this reply might
 mess up a few things (using GMail so can't edit headers). And since
 then there have been a number of replies.

 Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
 (GM45 Express Chipset; probably GMA 4500MHD gpu).

 The good news is all of a sudden I do not see the stuck behaviour.
 It does scroll, but awfully slowly. Both up down and sideways (I like
 to read while holding down the right arrow key). There have been some
 Intel driver and Mesa updates in the recent past, so it is possible
 (though with a great level of uncertainty) they did something (good).

 So the bad news is, well, the scrolling is slow. The raster graphics
 system switch did not appear to help in my case. The bottomline is
 that if at least one other person cannot reproduce this (as in,
 scrolling works for you like it does in any other app in this world)
 then it is unlikely to be a LyX bug.

 And oh yes, I'm on KDE. But on my system it does not make a difference
 what DE or WM I'm on, as I've reproduced this with E17 and Openbox.

Upon further testing scrolling bumps the CPU usage from 1% on idle to
about 15-20%. This is LyX itself showing up on HTop, not X or anything
else related. Scrolling sideways doesn't take as much resources since
it takes its own sweet time.

The lag is more visible when there are objects being scrolled over,
rather than simple text. So I would assume a bit more CPU for that
would be normal.

Moreover, it doesn't take 100% of the CPU cycles, as appears to be
the main problem for similar problems reported around the web.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On Thu, Apr 26, 2012 at 3:17 PM, Richard Heck rgheck at comcast.net wrote:

 On 04/26/2012 11:02 AM, David L. Johnson wrote:

 On 04/26/2012 10:30 AM, Rashif Ray Rahman wrote:

 Hi all

 I've not been a LyX user for long but am going to write a 300-page academic 
 paper with it for the final typesetting and formatting. I've practised on 
 and off for the past few months but one thing that has always troubled me 
 is how I'm unable to scroll with the keyboard (up and down arrow keys). I'd 
 like to be rid of the mouse if possible.

 When I hold a particular directional key for up to 20 secs it appears to 
 work but as if it's in slow motion. Qt shouldn't be having any such 
 scrolling problem, so I haven't been able to troubleshoot this any further.

 I don't see this behavior at all.  The only thing that slows down scrolling 
 with the arrows is if the cursor enters a math formula.  Then it runs 
 through all the superscripts and subscripts, but still it is reasonably fast.

 You also might try using the Pageup and Pagedown keys.

 What system are you using?  Mine is debian testing (a linux variant), on a 
 fast machine -- but it works well on even my slow netbook.

 There have been occasional reports of this kind of problem, usually 
 connected, as far as we can tell, to interactions issues between LyX and 
 certain video drivers. So I'll ask, too: What system is this and, if it's 
 Linux, what desktop, what window manager, what X drivers?

 Richard

Hey guys

I wasn't subscribed when I sent the first e-mail so this reply might
mess up a few things (using GMail so can't edit headers). And since
then there have been a number of replies.

Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
(GM45 Express Chipset; probably GMA 4500MHD gpu).

The good news is all of a sudden I do not see the stuck behaviour.
It does scroll, but awfully slowly. Both up down and sideways (I like
to read while holding down the right arrow key). There have been some
Intel driver and Mesa updates in the recent past, so it is possible
(though with a great level of uncertainty) they did something (good).

So the bad news is, well, the scrolling is slow. The raster graphics
system switch did not appear to help in my case. The bottomline is
that if at least one other person cannot reproduce this (as in,
scrolling works for you like it does in any other app in this world)
then it is unlikely to be a LyX bug.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 4 May 2012 14:18, Rashif Ray Rahman sc...@archlinux.org wrote:
 Hey guys

 I wasn't subscribed when I sent the first e-mail so this reply might
 mess up a few things (using GMail so can't edit headers). And since
 then there have been a number of replies.

 Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
 (GM45 Express Chipset; probably GMA 4500MHD gpu).

 The good news is all of a sudden I do not see the stuck behaviour.
 It does scroll, but awfully slowly. Both up down and sideways (I like
 to read while holding down the right arrow key). There have been some
 Intel driver and Mesa updates in the recent past, so it is possible
 (though with a great level of uncertainty) they did something (good).

 So the bad news is, well, the scrolling is slow. The raster graphics
 system switch did not appear to help in my case. The bottomline is
 that if at least one other person cannot reproduce this (as in,
 scrolling works for you like it does in any other app in this world)
 then it is unlikely to be a LyX bug.

And oh yes, I'm on KDE. But on my system it does not make a difference
what DE or WM I'm on, as I've reproduced this with E17 and Openbox.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 4 May 2012 14:35, Rashif Ray Rahman sc...@archlinux.org wrote:
 On 4 May 2012 14:18, Rashif Ray Rahman sc...@archlinux.org wrote:
 Hey guys

 I wasn't subscribed when I sent the first e-mail so this reply might
 mess up a few things (using GMail so can't edit headers). And since
 then there have been a number of replies.

 Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
 (GM45 Express Chipset; probably GMA 4500MHD gpu).

 The good news is all of a sudden I do not see the stuck behaviour.
 It does scroll, but awfully slowly. Both up down and sideways (I like
 to read while holding down the right arrow key). There have been some
 Intel driver and Mesa updates in the recent past, so it is possible
 (though with a great level of uncertainty) they did something (good).

 So the bad news is, well, the scrolling is slow. The raster graphics
 system switch did not appear to help in my case. The bottomline is
 that if at least one other person cannot reproduce this (as in,
 scrolling works for you like it does in any other app in this world)
 then it is unlikely to be a LyX bug.

 And oh yes, I'm on KDE. But on my system it does not make a difference
 what DE or WM I'm on, as I've reproduced this with E17 and Openbox.

Upon further testing scrolling bumps the CPU usage from 1% on idle to
about 15-20%. This is LyX itself showing up on HTop, not X or anything
else related. Scrolling sideways doesn't take as much resources since
it takes its own sweet time.

The lag is more visible when there are objects being scrolled over,
rather than simple text. So I would assume a bit more CPU for that
would be normal.

Moreover, it doesn't take 100% of the CPU cycles, as appears to be
the main problem for similar problems reported around the web.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On Thu, Apr 26, 2012 at 3:17 PM, Richard Heck  comcast.net> wrote:
>
> On 04/26/2012 11:02 AM, David L. Johnson wrote:
>>
>> On 04/26/2012 10:30 AM, Rashif Ray Rahman wrote:
>>>
>>> Hi all
>>>
>>> I've not been a LyX user for long but am going to write a 300-page academic 
>>> paper with it for the final typesetting and formatting. I've practised on 
>>> and off for the past few months but one thing that has always troubled me 
>>> is how I'm unable to scroll with the keyboard (up and down arrow keys). I'd 
>>> like to be rid of the mouse if possible.
>>>
>>> When I hold a particular directional key for up to 20 secs it appears to 
>>> work but as if it's in slow motion. Qt shouldn't be having any such 
>>> scrolling problem, so I haven't been able to troubleshoot this any further.
>>>
>> I don't see this behavior at all.  The only thing that slows down scrolling 
>> with the arrows is if the cursor enters a math formula.  Then it runs 
>> through all the superscripts and subscripts, but still it is reasonably fast.
>>
>> You also might try using the  and  keys.
>>
>> What system are you using?  Mine is debian testing (a linux variant), on a 
>> fast machine -- but it works well on even my slow netbook.
>>
> There have been occasional reports of this kind of problem, usually 
> connected, as far as we can tell, to interactions issues between LyX and 
> certain video drivers. So I'll ask, too: What system is this and, if it's 
> Linux, what desktop, what window manager, what X drivers?
>
> Richard

Hey guys

I wasn't subscribed when I sent the first e-mail so this reply might
mess up a few things (using GMail so can't edit headers). And since
then there have been a number of replies.

Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
(GM45 Express Chipset; probably GMA 4500MHD gpu).

The good news is all of a sudden I do not see the "stuck" behaviour.
It does scroll, but awfully slowly. Both up down and sideways (I like
to read while holding down the right arrow key). There have been some
Intel driver and Mesa updates in the recent past, so it is possible
(though with a great level of uncertainty) they did something (good).

So the bad news is, well, the scrolling is slow. The raster graphics
system switch did not appear to help in my case. The bottomline is
that if at least one other person cannot reproduce this (as in,
scrolling works for you like it does in any other app in this world)
then it is unlikely to be a LyX bug.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 4 May 2012 14:18, Rashif Ray Rahman  wrote:
> Hey guys
>
> I wasn't subscribed when I sent the first e-mail so this reply might
> mess up a few things (using GMail so can't edit headers). And since
> then there have been a number of replies.
>
> Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
> (GM45 Express Chipset; probably GMA 4500MHD gpu).
>
> The good news is all of a sudden I do not see the "stuck" behaviour.
> It does scroll, but awfully slowly. Both up down and sideways (I like
> to read while holding down the right arrow key). There have been some
> Intel driver and Mesa updates in the recent past, so it is possible
> (though with a great level of uncertainty) they did something (good).
>
> So the bad news is, well, the scrolling is slow. The raster graphics
> system switch did not appear to help in my case. The bottomline is
> that if at least one other person cannot reproduce this (as in,
> scrolling works for you like it does in any other app in this world)
> then it is unlikely to be a LyX bug.

And oh yes, I'm on KDE. But on my system it does not make a difference
what DE or WM I'm on, as I've reproduced this with E17 and Openbox.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Rashif Ray Rahman]

On 4 May 2012 14:35, Rashif Ray Rahman  wrote:
> On 4 May 2012 14:18, Rashif Ray Rahman  wrote:
>> Hey guys
>>
>> I wasn't subscribed when I sent the first e-mail so this reply might
>> mess up a few things (using GMail so can't edit headers). And since
>> then there have been a number of replies.
>>
>> Anyway I should've mentioned that I'm on Arch Linux and Intel graphics
>> (GM45 Express Chipset; probably GMA 4500MHD gpu).
>>
>> The good news is all of a sudden I do not see the "stuck" behaviour.
>> It does scroll, but awfully slowly. Both up down and sideways (I like
>> to read while holding down the right arrow key). There have been some
>> Intel driver and Mesa updates in the recent past, so it is possible
>> (though with a great level of uncertainty) they did something (good).
>>
>> So the bad news is, well, the scrolling is slow. The raster graphics
>> system switch did not appear to help in my case. The bottomline is
>> that if at least one other person cannot reproduce this (as in,
>> scrolling works for you like it does in any other app in this world)
>> then it is unlikely to be a LyX bug.
>
> And oh yes, I'm on KDE. But on my system it does not make a difference
> what DE or WM I'm on, as I've reproduced this with E17 and Openbox.

Upon further testing scrolling bumps the CPU usage from 1% on idle to
about 15-20%. This is LyX itself showing up on HTop, not X or anything
else related. Scrolling sideways doesn't take as much resources since
it takes its own sweet time.

The lag is more visible when there are objects being scrolled over,
rather than simple text. So I would assume a bit more CPU for that
would be normal.

Moreover, it doesn't take "100%" of the CPU cycles, as appears to be
the main problem for similar problems reported around the web.


--
GPG/PGP ID: C0711BF1

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Pavel Sanda]

Thomas Coffee wrote:
 I have experienced unbearably sluggish scrolling and typing in LyX that
 after much research I attribute to a poor interaction between Qt 4 and my
 NVIDIA graphics card driver.
 
 I solved these issues by starting LyX with:
 
 lyx -graphicssystem raster

I haven't heard about this workaround but it makes lot of sense. Many of
slugish reports seems to be related to X-drivers traffic. To check whether
this is your case then try to scroll and look via e.g. top on the usage of
your CPU - if X is taking 80-90% and LyX 10-20% then you have probably this
kind of problem.

Pavel

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[stefano franchi]

On Fri, Apr 27, 2012 at 3:51 AM, Pavel Sanda sa...@lyx.org wrote:
 Thomas Coffee wrote:
 I have experienced unbearably sluggish scrolling and typing in LyX that
 after much research I attribute to a poor interaction between Qt 4 and my
 NVIDIA graphics card driver.

 I solved these issues by starting LyX with:

 lyx -graphicssystem raster

 I haven't heard about this workaround but it makes lot of sense. Many of
 slugish reports seems to be related to X-drivers traffic. To check whether
 this is your case then try to scroll and look via e.g. top on the usage of
 your CPU - if X is taking 80-90% and LyX 10-20% then you have probably this
 kind of problem.


Not exactly on topic, but related to this issue for those on Linux
using proprietary nvidia drivers. Apparently, the latest version of
the driver, 295.40, suffers from some serious bug that tends to slow
down the system and occasionally max out X to 100% system resources,
with consequent freeze. The issue as surfaced among Archlinux users
and has also been reported elsewhere.  Some users have benefited from
downgrading to the previous version. Others, like me :-(, are still
waiting for a revised version to come from Nvidia.

Chers,

Stefano




 Pavel



-- 
__
Stefano Franchi
Associate Research Professor
Department of Hispanic Studies            Ph:   +1 (979) 845-2125
Texas AM University                          Fax:  +1 (979) 845-6421
College Station, Texas, USA

stef...@tamu.edu
http://stefano.cleinias.org

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Pavel Sanda]

Thomas Coffee wrote:
 I have experienced unbearably sluggish scrolling and typing in LyX that
 after much research I attribute to a poor interaction between Qt 4 and my
 NVIDIA graphics card driver.
 
 I solved these issues by starting LyX with:
 
 lyx -graphicssystem raster

I haven't heard about this workaround but it makes lot of sense. Many of
slugish reports seems to be related to X-drivers traffic. To check whether
this is your case then try to scroll and look via e.g. top on the usage of
your CPU - if X is taking 80-90% and LyX 10-20% then you have probably this
kind of problem.

Pavel

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[stefano franchi]

On Fri, Apr 27, 2012 at 3:51 AM, Pavel Sanda sa...@lyx.org wrote:
 Thomas Coffee wrote:
 I have experienced unbearably sluggish scrolling and typing in LyX that
 after much research I attribute to a poor interaction between Qt 4 and my
 NVIDIA graphics card driver.

 I solved these issues by starting LyX with:

 lyx -graphicssystem raster

 I haven't heard about this workaround but it makes lot of sense. Many of
 slugish reports seems to be related to X-drivers traffic. To check whether
 this is your case then try to scroll and look via e.g. top on the usage of
 your CPU - if X is taking 80-90% and LyX 10-20% then you have probably this
 kind of problem.


Not exactly on topic, but related to this issue for those on Linux
using proprietary nvidia drivers. Apparently, the latest version of
the driver, 295.40, suffers from some serious bug that tends to slow
down the system and occasionally max out X to 100% system resources,
with consequent freeze. The issue as surfaced among Archlinux users
and has also been reported elsewhere.  Some users have benefited from
downgrading to the previous version. Others, like me :-(, are still
waiting for a revised version to come from Nvidia.

Chers,

Stefano




 Pavel



-- 
__
Stefano Franchi
Associate Research Professor
Department of Hispanic Studies            Ph:   +1 (979) 845-2125
Texas AM University                          Fax:  +1 (979) 845-6421
College Station, Texas, USA

stef...@tamu.edu
http://stefano.cleinias.org

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Pavel Sanda]

Thomas Coffee wrote:
> I have experienced unbearably sluggish scrolling and typing in LyX that
> after much research I attribute to a poor interaction between Qt 4 and my
> NVIDIA graphics card driver.
> 
> I solved these issues by starting LyX with:
> 
> lyx -graphicssystem raster

I haven't heard about this workaround but it makes lot of sense. Many of
slugish reports seems to be related to X<->drivers traffic. To check whether
this is your case then try to scroll and look via e.g. top on the usage of
your CPU - if X is taking 80-90% and LyX 10-20% then you have probably this
kind of problem.

Pavel

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[stefano franchi]

On Fri, Apr 27, 2012 at 3:51 AM, Pavel Sanda  wrote:
> Thomas Coffee wrote:
>> I have experienced unbearably sluggish scrolling and typing in LyX that
>> after much research I attribute to a poor interaction between Qt 4 and my
>> NVIDIA graphics card driver.
>>
>> I solved these issues by starting LyX with:
>>
>> lyx -graphicssystem raster
>
> I haven't heard about this workaround but it makes lot of sense. Many of
> slugish reports seems to be related to X<->drivers traffic. To check whether
> this is your case then try to scroll and look via e.g. top on the usage of
> your CPU - if X is taking 80-90% and LyX 10-20% then you have probably this
> kind of problem.
>

Not exactly on topic, but related to this issue for those on Linux
using proprietary nvidia drivers. Apparently, the latest version of
the driver, 295.40, suffers from some serious bug that tends to slow
down the system and occasionally max out X to 100% system resources,
with consequent freeze. The issue as surfaced among Archlinux users
and has also been reported elsewhere.  Some users have benefited from
downgrading to the previous version. Others, like me :-(, are still
waiting for a revised version to come from Nvidia.

Chers,

Stefano




> Pavel



-- 
__
Stefano Franchi
Associate Research Professor
Department of Hispanic Studies            Ph:   +1 (979) 845-2125
Texas A University                          Fax:  +1 (979) 845-6421
College Station, Texas, USA

stef...@tamu.edu
http://stefano.cleinias.org

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Thomas Coffee]

I have experienced unbearably sluggish scrolling and typing in LyX that
after much research I attribute to a poor interaction between Qt 4 and my
NVIDIA graphics card driver.

I solved these issues by starting LyX with:

lyx -graphicssystem raster

I have seen this problem described using both GNOME and KDE with NVIDIA
cards (though there also appear to be unrelated scrolling and typing lag
problems out there). The same fallback helps with other Qt-based programs I
run, but beware that it may cause some rendering glitches (though I have
not seen any in LyX).

http://forum.kde.org/viewtopic.php?f=66t=90821
http://www.nvnews.net/vbulletin/showthread.php?t=148778page=2

- Thomas


On Thu, Apr 26, 2012 at 3:17 PM, Richard Heck rgh...@comcast.net wrote:

 On 04/26/2012 11:02 AM, David L. Johnson wrote:

 On 04/26/2012 10:30 AM, Rashif Ray Rahman wrote:

 Hi all

 I've not been a LyX user for long but am going to write a 300-page
 academic paper with it for the final typesetting and formatting. I've
 practised on and off for the past few months but one thing that has always
 troubled me is how I'm unable to scroll with the keyboard (up and down
 arrow keys). I'd like to be rid of the mouse if possible.

 When I hold a particular directional key for up to 20 secs it appears to
 work but as if it's in slow motion. Qt shouldn't be having any such
 scrolling problem, so I haven't been able to troubleshoot this any further.

  I don't see this behavior at all.  The only thing that slows down
 scrolling with the arrows is if the cursor enters a math formula.  Then it
 runs through all the superscripts and subscripts, but still it is
 reasonably fast.

 You also might try using the Pageup and Pagedown keys.

 What system are you using?  Mine is debian testing (a linux variant), on
 a fast machine -- but it works well on even my slow netbook.

  There have been occasional reports of this kind of problem, usually
 connected, as far as we can tell, to interactions issues between LyX and
 certain video drivers. So I'll ask, too: What system is this and, if it's
 Linux, what desktop, what window manager, what X drivers?

 Richard

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Richard Heck]

On 04/26/2012 07:27 PM, Thomas Coffee wrote:
I have experienced unbearably sluggish scrolling and typing in LyX 
that after much research I attribute to a poor interaction between Qt 
4 and my NVIDIA graphics card driver.


Yes, that's what most people have reported. But it seems to be dependent 
upon something else, too. I use Fedora with KDE and the proprietary 
NVidia drivers, and I do not have a problem. That said, there was one 
time I did see it, though a restart fixed it. So it's very puzzling.


Richard

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Thomas Coffee]

I have experienced unbearably sluggish scrolling and typing in LyX that
after much research I attribute to a poor interaction between Qt 4 and my
NVIDIA graphics card driver.

I solved these issues by starting LyX with:

lyx -graphicssystem raster

I have seen this problem described using both GNOME and KDE with NVIDIA
cards (though there also appear to be unrelated scrolling and typing lag
problems out there). The same fallback helps with other Qt-based programs I
run, but beware that it may cause some rendering glitches (though I have
not seen any in LyX).

http://forum.kde.org/viewtopic.php?f=66t=90821
http://www.nvnews.net/vbulletin/showthread.php?t=148778page=2

- Thomas


On Thu, Apr 26, 2012 at 3:17 PM, Richard Heck rgh...@comcast.net wrote:

 On 04/26/2012 11:02 AM, David L. Johnson wrote:

 On 04/26/2012 10:30 AM, Rashif Ray Rahman wrote:

 Hi all

 I've not been a LyX user for long but am going to write a 300-page
 academic paper with it for the final typesetting and formatting. I've
 practised on and off for the past few months but one thing that has always
 troubled me is how I'm unable to scroll with the keyboard (up and down
 arrow keys). I'd like to be rid of the mouse if possible.

 When I hold a particular directional key for up to 20 secs it appears to
 work but as if it's in slow motion. Qt shouldn't be having any such
 scrolling problem, so I haven't been able to troubleshoot this any further.

  I don't see this behavior at all.  The only thing that slows down
 scrolling with the arrows is if the cursor enters a math formula.  Then it
 runs through all the superscripts and subscripts, but still it is
 reasonably fast.

 You also might try using the Pageup and Pagedown keys.

 What system are you using?  Mine is debian testing (a linux variant), on
 a fast machine -- but it works well on even my slow netbook.

  There have been occasional reports of this kind of problem, usually
 connected, as far as we can tell, to interactions issues between LyX and
 certain video drivers. So I'll ask, too: What system is this and, if it's
 Linux, what desktop, what window manager, what X drivers?

 Richard

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Richard Heck]

On 04/26/2012 07:27 PM, Thomas Coffee wrote:
I have experienced unbearably sluggish scrolling and typing in LyX 
that after much research I attribute to a poor interaction between Qt 
4 and my NVIDIA graphics card driver.


Yes, that's what most people have reported. But it seems to be dependent 
upon something else, too. I use Fedora with KDE and the proprietary 
NVidia drivers, and I do not have a problem. That said, there was one 
time I did see it, though a restart fixed it. So it's very puzzling.


Richard

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Thomas Coffee]

I have experienced unbearably sluggish scrolling and typing in LyX that
after much research I attribute to a poor interaction between Qt 4 and my
NVIDIA graphics card driver.

I solved these issues by starting LyX with:

lyx -graphicssystem raster

I have seen this problem described using both GNOME and KDE with NVIDIA
cards (though there also appear to be unrelated scrolling and typing lag
problems out there). The same fallback helps with other Qt-based programs I
run, but beware that it may cause some rendering glitches (though I have
not seen any in LyX).

http://forum.kde.org/viewtopic.php?f=66=90821
http://www.nvnews.net/vbulletin/showthread.php?t=148778=2

- Thomas


On Thu, Apr 26, 2012 at 3:17 PM, Richard Heck  wrote:

> On 04/26/2012 11:02 AM, David L. Johnson wrote:
>
>> On 04/26/2012 10:30 AM, Rashif Ray Rahman wrote:
>>
>>> Hi all
>>>
>>> I've not been a LyX user for long but am going to write a 300-page
>>> academic paper with it for the final typesetting and formatting. I've
>>> practised on and off for the past few months but one thing that has always
>>> troubled me is how I'm unable to scroll with the keyboard (up and down
>>> arrow keys). I'd like to be rid of the mouse if possible.
>>>
>>> When I hold a particular directional key for up to 20 secs it appears to
>>> work but as if it's in slow motion. Qt shouldn't be having any such
>>> scrolling problem, so I haven't been able to troubleshoot this any further.
>>>
>>>  I don't see this behavior at all.  The only thing that slows down
>> scrolling with the arrows is if the cursor enters a math formula.  Then it
>> runs through all the superscripts and subscripts, but still it is
>> reasonably fast.
>>
>> You also might try using the  and  keys.
>>
>> What system are you using?  Mine is debian testing (a linux variant), on
>> a fast machine -- but it works well on even my slow netbook.
>>
>>  There have been occasional reports of this kind of problem, usually
> connected, as far as we can tell, to interactions issues between LyX and
> certain video drivers. So I'll ask, too: What system is this and, if it's
> Linux, what desktop, what window manager, what X drivers?
>
> Richard
>
>
>

Re: Scrolling Slowness [Re: keyboard Scrolling Anomaly]

[Richard Heck]

On 04/26/2012 07:27 PM, Thomas Coffee wrote:
I have experienced unbearably sluggish scrolling and typing in LyX 
that after much research I attribute to a poor interaction between Qt 
4 and my NVIDIA graphics card driver.


Yes, that's what most people have reported. But it seems to be dependent 
upon something else, too. I use Fedora with KDE and the proprietary 
NVidia drivers, and I do not have a problem. That said, there was one 
time I did see it, though a restart fixed it. So it's very puzzling.


Richard