Can't control image transparency #80863

New Issue

tempo Blend · 2020-09-17T01:30:54+02:00

tempo Blend commented

2020-09-17 01:30:54 +02:00

System Information
System:

Kernel: 5.4.64-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 
Desktop: GNOME 3.36.6 Distro: Manjaro Linux

CPU:

Topology: Dual Core model: Intel Core M-5Y10c bits: 64 type: MT MCP 
arch: Broadwell rev: 4 L2 cache: 4096 KiB 
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
bogomips: 7981 
Speed: 798 MHz min/max: 500/2000 MHz Core speeds (MHz): 1: 798 2: 798

3: 798 4: 798
Graphics:

Device-1: Intel HD Graphics 5300 vendor: Hewlett-Packard driver: i915 
v: kernel bus ID: 00:02.0 
Display: x11 server: X.org 1.20.8 driver: intel unloaded: modesetting 
resolution: <xdpyinfo missing> 
OpenGL: renderer: Mesa Intel HD Graphics 5300 (BDW GT2) v: 4.6 Mesa 20.1.7 
direct render: Yes

Blender Version
Broken: Blender 2.90.0
build date: 2020-09-04
build time: 21:14:50
build commit date: 2020-08-31
build commit time: 11:26
build hash: 0330d1af29
build platform: Linux
build type: Release

I've also tested on 2.83 from the site, and some appimages i found on github of 2.9 and 2.83 it did not work on any of those.

Short description of error
Can't control transparency of images on this machine, the image keeps the same transparency with every value except 0.0 where it completely disappears.
I've used blender on a different system (with different hardware and linux distro) and this error does not occur there, just to check I was pressing the right buttons.
I can control the transparency of the basic cube through Materials>Viewport Display>Color, so it's not problem with transparency in general

Exact steps for others to reproduce the error
Since this only happened on this system I can't give many details I just added a image (background or reference) and tried to control it's transparency

Thanks for your time, have a nice day.

**System Information** System: ``` Kernel: 5.4.64-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0 Desktop: GNOME 3.36.6 Distro: Manjaro Linux ``` CPU: ``` Topology: Dual Core model: Intel Core M-5Y10c bits: 64 type: MT MCP arch: Broadwell rev: 4 L2 cache: 4096 KiB flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 7981 Speed: 798 MHz min/max: 500/2000 MHz Core speeds (MHz): 1: 798 2: 798 ``` 3: 798 4: 798 Graphics: ``` Device-1: Intel HD Graphics 5300 vendor: Hewlett-Packard driver: i915 v: kernel bus ID: 00:02.0 Display: x11 server: X.org 1.20.8 driver: intel unloaded: modesetting resolution: <xdpyinfo missing> OpenGL: renderer: Mesa Intel HD Graphics 5300 (BDW GT2) v: 4.6 Mesa 20.1.7 direct render: Yes ``` **Blender Version** Broken: Blender 2.90.0 build date: 2020-09-04 build time: 21:14:50 build commit date: 2020-08-31 build commit time: 11:26 build hash: 0330d1af29c0 build platform: Linux build type: Release I've also tested on 2.83 from the site, and some appimages i found on github of 2.9 and 2.83 it did not work on any of those. **Short description of error** Can't control transparency of images on this machine, the image keeps the same transparency with every value except 0.0 where it completely disappears. I've used blender on a different system (with different hardware and linux distro) and this error does not occur there, just to check I was pressing the right buttons. I can control the transparency of the basic cube through Materials>Viewport Display>Color, so it's not problem with transparency in general **Exact steps for others to reproduce the error** Since this only happened on this system I can't give many details I just added a image (background or reference) and tried to control it's transparency ![outBlender.png](https://archive.blender.org/developer/F8890616/outBlender.png) Thanks for your time, have a nice day.

tempo Blend commented

2020-09-17 01:30:54 +02:00

Added subscriber: @tempoB

Germano Cavalcante commented

2020-09-18 03:11:34 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-09-18 03:11:34 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Germano Cavalcante commented

2020-09-18 03:11:34 +02:00

Thanks for the report. This seems like a graphic driver issue. Please double-check if the drivers are up to date.

To upgrade to the latest driver, see here for more information: https://docs.blender.org/manual/en/dev/troubleshooting/gpu/index.html

Also try run ./blender --debug-gpu > debug_gpu.txt from the command line, trigger the bug, and attach the resulting file here.
https://docs.blender.org/manual/en/latest/advanced/command_line/launch/linux.html
Most likely this will contain more information about the error.

Thanks for the report. This seems like a graphic driver issue. Please double-check if the drivers are up to date. To upgrade to the latest driver, see here for more information: https://docs.blender.org/manual/en/dev/troubleshooting/gpu/index.html Also try run `./blender --debug-gpu > debug_gpu.txt` from the command line, trigger the bug, and attach the resulting file here. https://docs.blender.org/manual/en/latest/advanced/command_line/launch/linux.html Most likely this will contain more information about the error.

tempo Blend commented

2020-09-18 14:08:39 +02:00

@mano-wii I'm using the latest driver according to the package manager
Here's the debug-gpu debug_gpu.txt
I imported the image tried to change the transparency then exited blender.
This also appears on the command line:

~ >>> blender --debug-gpu > debug_gpu.txt                                                   
Using OpenGL 4.3 debug facilities
GL application marker: Successfully hooked OpenGL debug callback.

thanks for the information

@mano-wii I'm using the latest driver according to the package manager Here's the debug-gpu [debug_gpu.txt](https://archive.blender.org/developer/F8895394/debug_gpu.txt) I imported the image tried to change the transparency then exited blender. This also appears on the command line: ``` ~ >>> blender --debug-gpu > debug_gpu.txt Using OpenGL 4.3 debug facilities GL application marker: Successfully hooked OpenGL debug callback. ``` thanks for the information

Germano Cavalcante commented

2020-09-18 15:11:46 +02:00

The debug_gpu.txt does not display any warning or error messages :
This must be a mysterious bug in the driver.
I fear that none of the active developers have access to this hardware.
So I'm not sure if there is much that developers can do to help in this case.

The `debug_gpu.txt` does not display any warning or error messages :\ This must be a mysterious bug in the driver. I fear that none of the active developers have access to this hardware. So I'm not sure if there is much that developers can do to help in this case.

tempo Blend commented

2020-09-18 16:53:08 +02:00

It's okay thanks for the help

Ankit Meel commented

2020-10-07 11:25:47 +02:00

Changed status from 'Needs User Info' to: 'Needs Developer To Reproduce'

Will commented

2020-11-22 03:51:41 +01:00

Added subscriber: @WCN

Will commented

2020-11-22 03:51:41 +01:00

This happens for me too using the Iris driver with Intel UHD620 graphics.

It works as expected with the I965 driver.

$ blender /tmp/untitled.blend:

$ MESA_LOADER_DRIVER_OVERRIDE=i965 blender /tmp/untitled.blend:

It also works as expected in Blender 2.82a, even when using the Iris driver:

This happens for me too using the `Iris` driver with Intel UHD620 graphics. It works as expected with the `I965` driver. `$ blender /tmp/untitled.blend`: ![image.png](https://archive.blender.org/developer/F9351479/image.png) `$ MESA_LOADER_DRIVER_OVERRIDE=i965 blender /tmp/untitled.blend`: ![image.png](https://archive.blender.org/developer/F9351491/image.png) It also works as expected in Blender 2.82a, even when using the `Iris` driver: ![image.png](https://archive.blender.org/developer/F9351543/image.png)

Philipp Oeser removed the

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Can't control image transparency #80863