Can't control image transparency
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	tempo Blend (tempBlend)
	Sep 17 2020, 1:30 AM

Description

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

Thanks for your time, have a nice day.

Related Objects

Mentioned Here: rB0330d1af29c0: Fix T77900: File Browser in macOS fullscreen crashes

Event Timeline

tempo Blend (tempBlend) created this task.Sep 17 2020, 1:30 AM

tempo Blend (tempBlend) added a project: Images & Movies.Sep 17 2020, 1:56 AM

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.

@Germano Cavalcante (mano-wii) I'm using the latest driver according to the package manager
Here's the debug-gpu

debug_gpu.txt224 KBDownload

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

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.