On 05.12.2011 15:48, Richard Heck wrote:


On windows7, LyX 2.0.2's scrolling is somehow broken to me. LyX.exe
takes 50% CPU (my machine is dual-core, so 50% CPU is max for many
programs), triggers CPU fan to max, and is very laggy (non smooth).

2.0.1, with both installers (official and Uwe's) has no such issue and
scrolls smoothly.

Even small documents trigger this, e.g. the "Introduction" to LyX.

OS: Win7 32 bits, professional.

Is anyone else seeing this on Windows?

Hi again,

Just to add a few more data points to this issue:

I've tried Uwe's installer and it has the same issue.

Also, I've tried on my home laptop, and I can reproduce the problem with 2.0.2 while 2.0.1 is fine. It's less visible, but my personal laptop is more powerful (cf. below).

So, the bug is easily visible when using the scrollbar to scroll a document (click it, drag up/down, drop): 2.0.1 is smooth (the scrollbar follows the mouse pointer, CPU use is moderate), while 2.0.2 is slow (the srollbar does not follow the mouse smoothly but jumps, CPU usage is high).

The 2 machines are quite different, both ~2 years old.
Profesional laptop is Windows 7 professional 32 bits, intel core 2vPro with an ATI radeon card.
Personal laptop is Windows 7 64 bits, intel core 7 with a NVidia card.
The antivirii are of different brands.

Best regards,

Olivier.

PS: I'll be in vacations tomorrow until early January with very limited connectivity, so won't be able to provide feedback/information in the next 2 weeks.

PPS: message resent, so you may see it twice. sorry for that.


Richard




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