Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

  This is worth posting to the wiki, if you're so inclined.

Well, I can do this. Which wiki section should I post to?

 Intel drivers for the older chips are currently broken and in most cases
 unusable. 
 So all in all I doubt this is somehow relevant for LyX it's more of a general
 issue.

Yes, it is a general driver-issue, but the one and only application on my PC 
that is so severly affected (it was in fact almost unusable) is Lyx. 

As far as I know, Opera and Mathematica also use Qt somehow (and Lyx is build 
upon Qt, isn't it?), but I didn't experience any problems with them. 
So I guess that the problem has something to do with the way Lyx uses Qt 
rendering engine.

Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

  This is worth posting to the wiki, if you're so inclined.

Well, I can do this. Which wiki section should I post to?

 Intel drivers for the older chips are currently broken and in most cases
 unusable. 
 So all in all I doubt this is somehow relevant for LyX it's more of a general
 issue.

Yes, it is a general driver-issue, but the one and only application on my PC 
that is so severly affected (it was in fact almost unusable) is Lyx. 

As far as I know, Opera and Mathematica also use Qt somehow (and Lyx is build 
upon Qt, isn't it?), but I didn't experience any problems with them. 
So I guess that the problem has something to do with the way Lyx uses Qt 
rendering engine.

Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

> > This is worth posting to the wiki, if you're so inclined.

Well, I can do this. Which wiki section should I post to?

> Intel drivers for the older chips are currently broken and in most cases
> unusable. 
> So all in all I doubt this is somehow relevant for LyX it's more of a general
> issue.

Yes, it is a general driver-issue, but the one and only application on my PC 
that is so severly affected (it was in fact almost unusable) is Lyx. 

As far as I know, Opera and Mathematica also use Qt somehow (and Lyx is build 
upon Qt, isn't it?), but I didn't experience any problems with them. 
So I guess that the problem has something to do with the way Lyx uses Qt 
rendering engine.

lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

Hi!

I would like to share my experience with solving very frustrating problem with 
typing in lyx 1.6.x under Ubuntu 9.04. Maybe this will help someone else or 
even lead to a fix in a next lyx version.

Recently I've upgraded to Ubuntu 9.04. After that, I could not continue my work 
in lyx 1.6.2. When typing, I experienced a very large delay (like seconds) 
before all symbols would appear on screen. 

I read through all posts in lyx mailing list with similar symptoms (just 2 or 
3). The only solution there that worked was to buy a new video card.

What I've done next:

1) Installed lyx 1.6.0 - the same typing delay. Installed lyx 1.5.7 - no typing 
delays. Returned back to lyx 1.6.2.

2) Looked at the CPU utilization. When typing, Xorg ate up to 50% CPU.
Then I resized lyx window to be smaller. CPU utilization fall down, and typing 
delay decreased. I resized lyx to be 25% of the screen - typing delay almost 
disappeared.

3) I looked which video card I have (lspci |grep Display) - Intel Corporation 
82945G/GZ Integrated Graphics Controller (rev 02)
I googled for problems with Intel graphics under Ubuntu 9, and found this link 
useful:
http://ubuntuforums.org/showthread.php?t=1130582highlight=ubuntu+slow+update
+jaunty

4) I tried different solutions from the link above and mostly got my X broken 
or no effect. Finally this one worked for me:

- open xorg.conf (sudo gedit /etc/X11/xorg.conf)
- go to section Device, mine was
Section Device
Identifier  Configured Video Device
EndSection
- add Option MigrationHeuristic greedy so the section looks now like this
Section Device
Identifier  Configured Video Device
Option  MigrationHeuristicgreedy
EndSection
- restart X or reboot.

Now I have almost no typing delays in lyx 1.6.2 (at least, typing speed is the 
same as in lyx 1.5.7 on my PC).

Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

Richard Talley rich.tal...@... writes:

 
 I'd be very interested in knowing what your Xorg CPU utilization is
 like now. I'm having a similar problem on an old server running
 Xubuntu 9.04, where Xorg is hogging the CPU. Thanks.  -- Rich

Xorg uses 10-20% CPU now, usually 10%.

lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

Hi!

I would like to share my experience with solving very frustrating problem with 
typing in lyx 1.6.x under Ubuntu 9.04. Maybe this will help someone else or 
even lead to a fix in a next lyx version.

Recently I've upgraded to Ubuntu 9.04. After that, I could not continue my work 
in lyx 1.6.2. When typing, I experienced a very large delay (like seconds) 
before all symbols would appear on screen. 

I read through all posts in lyx mailing list with similar symptoms (just 2 or 
3). The only solution there that worked was to buy a new video card.

What I've done next:

1) Installed lyx 1.6.0 - the same typing delay. Installed lyx 1.5.7 - no typing 
delays. Returned back to lyx 1.6.2.

2) Looked at the CPU utilization. When typing, Xorg ate up to 50% CPU.
Then I resized lyx window to be smaller. CPU utilization fall down, and typing 
delay decreased. I resized lyx to be 25% of the screen - typing delay almost 
disappeared.

3) I looked which video card I have (lspci |grep Display) - Intel Corporation 
82945G/GZ Integrated Graphics Controller (rev 02)
I googled for problems with Intel graphics under Ubuntu 9, and found this link 
useful:
http://ubuntuforums.org/showthread.php?t=1130582highlight=ubuntu+slow+update
+jaunty

4) I tried different solutions from the link above and mostly got my X broken 
or no effect. Finally this one worked for me:

- open xorg.conf (sudo gedit /etc/X11/xorg.conf)
- go to section Device, mine was
Section Device
Identifier  Configured Video Device
EndSection
- add Option MigrationHeuristic greedy so the section looks now like this
Section Device
Identifier  Configured Video Device
Option  MigrationHeuristicgreedy
EndSection
- restart X or reboot.

Now I have almost no typing delays in lyx 1.6.2 (at least, typing speed is the 
same as in lyx 1.5.7 on my PC).

Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

Richard Talley rich.tal...@... writes:

 
 I'd be very interested in knowing what your Xorg CPU utilization is
 like now. I'm having a similar problem on an old server running
 Xubuntu 9.04, where Xorg is hogging the CPU. Thanks.  -- Rich

Xorg uses 10-20% CPU now, usually 10%.

lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

Hi!

I would like to share my experience with solving very frustrating problem with 
typing in lyx 1.6.x under Ubuntu 9.04. Maybe this will help someone else or 
even lead to a fix in a next lyx version.

Recently I've upgraded to Ubuntu 9.04. After that, I could not continue my work 
in lyx 1.6.2. When typing, I experienced a very large delay (like seconds) 
before all symbols would appear on screen. 

I read through all posts in lyx mailing list with similar symptoms (just 2 or 
3). The only solution there that worked was to buy a new video card.

What I've done next:

1) Installed lyx 1.6.0 - the same typing delay. Installed lyx 1.5.7 - no typing 
delays. Returned back to lyx 1.6.2.

2) Looked at the CPU utilization. When typing, Xorg ate up to 50% CPU.
Then I resized lyx window to be smaller. CPU utilization fall down, and typing 
delay decreased. I resized lyx to be 25% of the screen - typing delay almost 
disappeared.

3) I looked which video card I have (lspci |grep Display) - Intel Corporation 
82945G/GZ Integrated Graphics Controller (rev 02)
I googled for problems with Intel graphics under Ubuntu 9, and found this link 
useful:
http://ubuntuforums.org/showthread.php?t=1130582=ubuntu+slow+update
+jaunty

4) I tried different solutions from the link above and mostly got my X broken 
or no effect. Finally this one worked for me:

- open xorg.conf (sudo gedit /etc/X11/xorg.conf)
- go to section "Device", mine was
Section "Device"
Identifier  "Configured Video Device"
EndSection
- add Option "MigrationHeuristic" "greedy" so the section looks now like this
Section "Device"
Identifier  "Configured Video Device"
Option  "MigrationHeuristic""greedy"
EndSection
- restart X or reboot.

Now I have almost no typing delays in lyx 1.6.2 (at least, typing speed is the 
same as in lyx 1.5.7 on my PC).

Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing

[Alex M]

Richard Talley  writes:

> 
> I'd be very interested in knowing what your Xorg CPU utilization is
> like now. I'm having a similar problem on an old server running
> Xubuntu 9.04, where Xorg is hogging the CPU. Thanks.  -- Rich

Xorg uses 10-20% CPU now, usually 10%.