The LibreOffice 5.1 behaviour appears rather slow even with easy tasks. A one-page ODT file with just text takes several seconds to open. In Impress moving text boxes feels rather gluey. Going back to 5.0.5.2 brought back the usual behavior. I'm running a Intel G630 with 2.70Ghz, 4GB RAM, Win 10 Home, 64bit.
Disable Tools - Options - LibO - View - Use OpenGL for all rendering Does it help? Report here the contents of your: C:\Users\User\AppData\Roaming\LibreOffice\4\cache\opengl_device.log .. if you did not already in some other report :) So many OGL reports lately due to the blacklist blunder. Set to NEEDINFO. Change back to UNCONFIRMED after you have provided the information.
Taking the mentioned 1 page ODT file it goes from 3-4 seconds to 2 seconds (roughly) when opening from the general LibreOffice surface. This goes along with two flickers before it actually opened. So it is notable faster.
(In reply to andras.drea from comment #2) > Taking the mentioned 1 page ODT file it goes from 3-4 seconds to 2 seconds > (roughly) when opening from the general LibreOffice surface. This goes along > with two flickers before it actually opened. So it is notable faster. Ok, cool.. could you open that opengl_device.log file and copy and paste here the contents so we know your graphics card driver details?
This version has had so many bugs! I have a list of about ten that personally are making my job as an editor difficult. Now, in the last few days, it slows down to an almost stop. Windows can't be moved - only closed; making a correction or even dropping down a menu can take a few minutes! I have a lightning speed processor and tons of memory. Anyone know what the problem is and why this just started but is now persistent every time I open it and try to use it. I'm about to uninstall and downgrade to an earlier version. Sadly, I don't remember what I was using before - but it was without flaws I could find. This is so full of problems as to make it unusable until fixed. Sorry for the tone and I know it upsets those who work on this, but I make my living doing editing and time and ease of use are money for me and I can't work with this version until many things are fixed...but the slowdown [without using much cpu] is a last straw - until fixed. I can find no work around and am forced to shut it down.
(In reply to Peter Lemkin from comment #4) > This version has had so many bugs! I have a list of about ten that Is it slow/buggy even if you have disabled Tools - Options - LibO - View - Use OpenGL for all rendering and restarted LibreOffice?
Here you are: DriverVersion: 9.18.13.4192 DriverDate: 10-13-2015 DeviceID: PCI\VEN_10DE&DEV_10C3&SUBSYS_13013842&REV_A2 AdapterVendorID: 0x10de AdapterDeviceID: 0x10c3 AdapterSubsysID: 0x13013842 DeviceKey: System\CurrentControlSet\Control\Video\{E82FEF4C-629C-4FED-8340-D596536894CC}\0000 DeviceString: NVIDIA GeForce 8400GS
Another black-listed card that slipped through the black-list =) you should default to gdi now.