# PTB-WARNING: Flip for window 10 didn't use pageflipping for flip. Visual presentation timing and timestamps are likely unreliable! **URL:** \ **Category:** Programming Help\ **Tags:** windows\ **Created:** [December 13, 2024, 4:55pm UTC](https://psychtoolbox.discourse.group/t/ptb-warning-flip-for-window-10-didnt-use-pageflipping-for-flip-visual-presentation-timing-and-timestamps-are-likely-unreliable/5588 "2024-12-13T16:55:46Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![DEC\_labmanager](https://avatars.discourse-cdn.com/v4/letter/d/ecc23a/32.png) [@DEC\_labmanager](https://psychtoolbox.discourse.group/u/DEC_labmanager)\ **Post date:** [December 13, 2024, 4:55pm UTC](https://psychtoolbox.discourse.group/t/ptb-warning-flip-for-window-10-didnt-use-pageflipping-for-flip-visual-presentation-timing-and-timestamps-are-likely-unreliable/5588/1 "2024-12-13T16:55:46Z")
Hello, **we bought several laptops with an AMD Rembrandt iGPU and an AMD dGPU Navi 33 [Radeon RX 7700S/7600/7600S/7600M XT/PRO W7600], we installed the last version of Matlab 2024b and Psychtoolbox version 3.0.19.16** **We have the following errors when launching experiment with the running script even after disabling the notifications under Settings :** _Synching flips with softer requirements…_ _PTB-INFO: This is Psychtoolbox-3 for GNU/Linux X11, under Matlab 64-Bit Intel (Version 3.0.19 - Build date: Sep 27 2024)._ _PTB-INFO: OS support status: Linux 6.8.0-50-lowlatency Supported._ _PTB-INFO: Type ‘PsychtoolboxVersion’ for more detailed version information._ _PTB-INFO: Most parts of the Psychtoolbox distribution are licensed to you under terms of the MIT License, with_ _PTB-INFO: some restrictions. See file ‘License.txt’ in the Psychtoolbox root folder for the exact licensing conditions._ _PTB-INFO: For information about paid support, support memberships and other commercial services, please type_ _PTB-INFO: ‘PsychPaidSupportAndServices’._ _PTB-INFO: Hybrid graphics setup with DRI PRIME muxless render offload detected._ _PTB-WARNING: Flip 3 for window 10 didn’t use pageflipping for flip. Visual presentation timing and timestamps are likely unreliable!_ _PTB-WARNING: Something is misconfigured on your system, otherwise pageflipping would have been used by the graphics driver for reliable timing._ _PTB-WARNING: However, if you see this message only sporadically, this might be caused by onscreen popup messages a la “You have new mail!” or_ _PTB-WARNING: “New updates are ready to install” etc. Being low on free system memory can cause this as well, especially on integrated graphics chips._ _PTB-WARNING: Read the Linux specific section of ‘help SyncTrouble’ for some other common causes and fixes for this problem._ _…_ _PTB-INFO: There are still 55 textures, offscreen windows or proxy windows open. Screen(‘CloseAll’) will auto-close them._ _PTB-INFO: This may be fine for studies where you only use a few textures or windows, but a large number of open_ _PTB-INFO: textures or offscreen windows can be an indication that you forgot to dispose no longer needed items_ _PTB-INFO: via a proper call to Screen(‘Close’, [windowOrTextureIndex]); , e.g., at the end of each trial. These_ _PTB-INFO: stale objects linger around and can consume significant memory ressources, causing degraded performance,_ _PTB-INFO: timing trouble (if the system has to resort to disk paging) and ultimately out of memory conditions or_ _PTB-INFO: crashes. Please check your code. (Screen(‘Close’) is a quick way to release all textures and offscreen windows)_ _INFO: PTB’s Screen(‘Flip’, 10) command seems to have missed the requested stimulus presentation deadline_ _INFO: a total of 3 times out of a total of 12 flips during this session._ _INFO: This number is fairly accurate (and indicative of real timing problems in your own code or your system)_ _INFO: if you provided requested stimulus onset times with the ‘when’ argument of Screen(‘Flip’, window [, when]);_ _INFO: If you called Screen(‘Flip’, window); without the ‘when’ argument, this count is more of a ‘‘mild’’ indicator_ _INFO: of timing behaviour than a hard reliable measurement. Large numbers may indicate problems and should at least_ _INFO: deserve your closer attention. Cfe. ‘help SyncTrouble’, the FAQ section at [www.psychtoolbox.org](http://www.psychtoolbox.org) and the_ _INFO: examples in the PDF presentation in PsychDocumentation/Psychtoolbox3-Slides.pdf for more info and timing tips._ **Even after adding the configuration file below under /.Psychtoolbox/XorgConfs/ and running both scripts XorgConfCreator&XorgConfSelector, we still have the same errors.** **Conf file :** Section “ServerLayout” Identifier “Hydra-2XScreensOn2GPUs” Screen 0 “Screen0” 0 0 Screen 1 “Screen1” RightOf “Screen0” EndSection Section “Device” Identifier “Card0” Driver “amdgpu” BusID “PCI:120@0:0:0” EndSection Section “Device” Identifier “Card1” Driver “amdgpu” BusID “PCI:3@0:0:0” EndSection Section “Screen” Identifier “Screen0” Device “Card1” EndSection Section “Screen” Identifier “Screen1” Device “Card1” EndSection Please let us know if you have advices. Thank you very much in advance. ---
**Author:** ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)\ **Post date:** [December 13, 2024, 6:28pm UTC](https://psychtoolbox.discourse.group/t/ptb-warning-flip-for-window-10-didnt-use-pageflipping-for-flip-visual-presentation-timing-and-timestamps-are-likely-unreliable/5588/2 "2024-12-13T18:28:54Z")
Probably running on Ubuntu 24.04 with standard Ubuntu desktop GUI, ergo probably this: > [@No pageflipping on Ubuntu 24.04-LTS with Ubuntu/Gnome desktop GUI](https://psychtoolbox.discourse.group/t/no-pageflipping-on-ubuntu-24-04-lts-with-ubuntu-gnome-desktop-gui/5459/2): > > Try to click on the notification area in the top-right corner of your Ubuntu desktop GUI, where the various controls, battery / network etc. indicators are. I think GNOME desktop, and thereby its derivative the standard Ubuntu desktop, has a bug on Ubuntu 24.04-LTS that prevents page-flipping, unless you click there, which somehow magically fixes the problem until the next logout + login. Or install a different desktop GUI like KDE and see how that goes. I wouldn’t know, but assuming a GNOME b… -mario