Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing
> > 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
On Wed, Aug 12, 2009 at 11:38:26AM -0400, Paul A. Rubin wrote: Hi, > >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&highlight=ubuntu+slow+update > >+jaunty > > This is worth posting to the wiki, if you're so inclined. Intel drivers for the older chips are currently broken and in most cases unusable. Phoronix wrote about it several times. The newer 9x chips seem to work again with Linux 2.6.30+ and the latest 2.9 Intel drivers. I've downgraded all my (Debian) systems with Intel 8x chips to an older Xorg version and the 2.3.2-2+lenny6 intel driver from Lenny. Currently that still works but someday it will break for sure. So all in all I doubt this is somehow relevant for LyX it's more of a general issue. Sven -- They're the cowards We are rebels We got the power to fight the devil [ AIV - We are rebels ]
Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing
Alex M wrote: 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&highlight=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). This is worth posting to the wiki, if you're so inclined. /Paul
Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing
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%.
Re: lyx 1.6.2 + Ubuntu 9.04 = slow typing
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 On Wed, Aug 12, 2009 at 6:41 AM, Alex M wrote: > 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&highlight=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). > >