On 3/10/19 12:18 PM, David Belius wrote:
No, it's turned off.
Den sön 10 mars 2019 kl 15:55 skrev Paul A. Rubin <parubi...@gmail.com
<mailto:parubi...@gmail.com>>:
On 3/10/19 8:31 AM, David Belius wrote:
Den sön 10 mars 2019 kl 01:11 skrev Paul A. Rubin
<parubi...@gmail.com <mailto:parubi...@gmail.com>>:
On 3/9/19 2:59 AM, David Belius wrote:
Den lör 9 mars 2019 kl 00:19 skrev Scott Kostyshak
<skost...@lyx.org <mailto:skost...@lyx.org>>:
On Fri, Mar 08, 2019 at 08:47:34PM +0100, David Belius
wrote:
> Hi,
>
> Recently Lyx has been sluggish when typing equations
and scrolling in
> moderately sized documents, to the point that it
becomes very frustrating.
> Is this known to be an issue with current versions? I
am using a fresh
> install of Lyx 2.3.2-2 on an up-to-date version of
Windows 10 (Version
> 1809). On Lyx 2.3.2 (2018-12-20) on Ubuntu 18.04.2 LTS
on a much older
> computer editing same document is very snappy.
I'm not sure I have seen such a report. It is hard to
know how to
diagnose the problem. When you see the sluggishness, are
you by chance
working on a file that is in a Dropbox folder and you
have automatic
save set to a high frequency? That's just a random
guess. We have seen
some problems from users with both Windows and Dropbox.
Indeed the file is in a dropbox folder. But
"Look&Feel->Document Handling->Backup documents every X
minutes" is set to 5, which doesn't seem bery high
frequency, and the problem persists even if I edit a copy of
the document I placed in a non-dropbox folder.
If you open the Windows Task Manager and then start editing a
document in LyX, does the Task Manager show either high CPU
utilization or high disk utilization for anything?
When I type into an equation CPU usage hits about 50%, split
evenly between Lyx and a process called "Usermode Font Driver
Host". I googled the latter and found some references to it in
connection with possibly similar problems
(https://forum.affinity.serif.com/index.php?/topic/51268-usermode-font-driver-host-freezes-computer/).
I tried the "clean boot" mentioned in that discussion but it
didn't change anything.
Incidently on Ubuntu the CPU usage for lyx in "top" hits ca 30%
when I type into an equation in the same document at the same
speed, but there is no additional process that sees increased CPU
usage and lyx remains responsive while typing, unlike on windows.
You don't by any chance have instant preview turned on, do you?
Paul
(Please bottom post so that others can follow the discussion more easily.)
There's a list of things to try at
https://www.thewindowsclub.com/windows-driver-foundationframework-using-high-cpu-memory.
Other than that, the only thing I could think of would be some sort of
issue with the screen font. You mentioned issues when typing math and
scrolling through documents. If the scrolling issues occur only in
documents containing math (or other "interesting" glyphs), and not in
plain text documents, you might try changing your screen fonts to
something "Windows-standard" (if they are not already so) and see if
that mitigates the issue.
This being Windows, I suppose we should also not rule out an exorcism. :-)
Paul
