macOS: Slowdown/crashes/ empty windows when using Sidecar feature with iPad #85394

New Issue

Nate Pfeiffer · 2021-02-05T03:39:12+01:00

Nate Pfeiffer commented

2021-02-05 03:39:12 +01:00

System Information
Operating system: Darwin-20.3.0-x86_64-i386-64bit 64 Bits
Graphics card: AMD Radeon Pro 5300M OpenGL Engine ATI Technologies Inc. 4.1 ATI-4.2.15

Blender Version
Broken: version: 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: 5be9ef4177
system-info.txt

Blender slows down immensely (moving view around while looking at the default cube goes from smooth 60fps to around 15fps) when I am using my iPad as an external display using the Sidecar feature on my Mac.
Blender is still running on my laptop's primary display, not the external display, when this occurs. Crashes also happen sometimes when using a Sidecar external monitor, but none of this occurs when using any other external monitor. Sometimes blender goes back to normal speed while using Sidecar, but then the preferences screen in Blender shows up as a blank screen.

Open Blender while using an iPad as an external monitor with Sidecar, or begin using Sidecar while blender is already open.
Outcome 1: Blender runs incredibly slowly, no matter which display it is on, and sometimes crashes just while navigating, or trying to render a scene.
Outcome 2: Blender runs at full speed, no matter which display it is on, but when I attempt to open the preferences menu, it shows up as a blank screen, and when I try to render a scene, the render window shows up as a blank screen.
[Based on the default startup.]

Included are a crash log from one of the crashes, and my blender system info file.
Blender_2021-02-04-192954_nert-macbook.txt

**System Information** Operating system: Darwin-20.3.0-x86_64-i386-64bit 64 Bits Graphics card: AMD Radeon Pro 5300M OpenGL Engine ATI Technologies Inc. 4.1 ATI-4.2.15 **Blender Version** Broken: version: 2.91.2, branch: master, commit date: 2021-01-19 16:15, hash: `5be9ef4177` [system-info.txt](https://archive.blender.org/developer/F9641598/system-info.txt) Blender slows down immensely (moving view around while looking at the default cube goes from smooth 60fps to around 15fps) when I am using my iPad as an external display using the Sidecar feature on my Mac. Blender is still running on my laptop's primary display, not the external display, when this occurs. Crashes also happen sometimes when using a Sidecar external monitor, but none of this occurs when using any other external monitor. Sometimes blender goes back to normal speed while using Sidecar, but then the preferences screen in Blender shows up as a blank screen. Open Blender while using an iPad as an external monitor with Sidecar, or begin using Sidecar while blender is already open. Outcome 1: Blender runs incredibly slowly, no matter which display it is on, and sometimes crashes just while navigating, or trying to render a scene. Outcome 2: Blender runs at full speed, no matter which display it is on, but when I attempt to open the preferences menu, it shows up as a blank screen, and when I try to render a scene, the render window shows up as a blank screen. [Based on the default startup.] Included are a crash log from one of the crashes, and my blender system info file. [Blender_2021-02-04-192954_nert-macbook.txt](https://archive.blender.org/developer/F9641597/Blender_2021-02-04-192954_nert-macbook.txt)

Nate Pfeiffer commented

2021-02-05 03:39:12 +01:00

Added subscriber: @517nate

blender-admin commented

2021-02-05 03:39:12 +01:00

#79514 was marked as duplicate of this issue

blender-admin commented

2021-02-05 03:39:12 +01:00

#87201 was marked as duplicate of this issue

blender-admin commented

2021-02-05 03:39:12 +01:00

#81463 was marked as duplicate of this issue

Johannes Jakob commented

2021-02-05 13:50:01 +01:00

Added subscriber: @johjakob-3

Johannes Jakob commented

2021-02-05 13:50:01 +01:00

I can reproduce these issues with Blender 2.92 Beta on my MacBook Pro 15" (2017) (macOS 11.2 Big Sur, AMD Radeon Pro 560 4 GB) when using my iPad (6th generation) (iPadOS 14.4) as a Sidecar display.

Blender runs with normal performance when it is opened before connecting to the iPad, but all windows except the main window are blank (Preferences, Render View, File Browser, etc.).
Opening Blender after connecting to the iPad results in very low viewport performance, but all windows are displayed correctly.

I can reproduce these issues with Blender 2.92 Beta on my MacBook Pro 15" (2017) (macOS 11.2 Big Sur, AMD Radeon Pro 560 4 GB) when using my iPad (6th generation) (iPadOS 14.4) as a Sidecar display. Blender runs with normal performance when it is opened before connecting to the iPad, but all windows except the main window are blank (Preferences, Render View, File Browser, etc.). Opening Blender after connecting to the iPad results in very low viewport performance, but all windows are displayed correctly.

Ankit Meel changed title from ~~Slowdown/crashes when using Sidecar feature on Mac (using iPad as external display)~~ to macOS: Slowdown/crashes/ empty windows when using Sidecar feature with iPad

2021-04-25 05:11:36 +02:00

Ankit Meel commented

2021-04-25 05:11:42 +02:00

Added subscribers: @Granarte, @jenkm, @HDMaster84