Tested the issue on 60.0.3112.113 with steps mentioned in Comment#0 on Ubuntu 14.04,Mesa Driver and is not reproducible. i.e; No Black windows are seen on share screen
Attaching screenshot for reference.

Probably GPU specific issue, Hence adding proper component for further triaging. 

@reporter:Also Could you try the steps mentioned by disabling all the extensions or by creating fresh profile.

Deleted: Issue_760119.png 307 KB

	Issue_760119.png 307 KB View Download

Clicked on my profile, clicked on manage profiles, add profile, named it "New Profile"

Opened new screen with "New Profile"

went to appear.in/<whatever name>

clicked on Share Screen
browser asked to install extension
clicked "Add extension"
...

https://imgur.com/rc401Rb

I am going to assume it's my video driver, and something odd.  I set up Workspaces yesterday, and noticed that if my shared window was on a different workspace, one I'm not actively looking at, I can see the contents of the shared window

https://imgur.com/bHdEMJj

But I can't seem to record the switching of the workspaces.

Now I'm on a newer version of Chrome, and still seeing this.  I'll tinker with my video driver packages, as they are not the default ones, and maybe hopefully it's the fault of my video drivers.

Thank you for providing more feedback. Adding requester "sc00335628@techmahindra.com" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

I have tried older GPUs from the PPA graphics-drivers:  ppa:graphics-drivers/ppa

Cycled between 384, 381, and 371.  I've gone back to 384, and am in the process of backing up all my data to an NFS share, and reinstall the OS and see if I can reproduce with latest + graphics drivers for my M2000 quadro card

lspci
01:00.0 VGA compatible controller: NVIDIA Corporation Device 1430 (rev a1)


lshw output:

ahernandez@office-pc:~$ sudo lshw -c video
  *-display               
       description: VGA compatible controller
       product: NVIDIA Corporation
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:35 memory:f6000000-f6ffffff memory:e0000000-efffffff memory:f0000000-f1ffffff ioport:e000(size=128) memory:c0000-dffff


Screen shot of my nvidia-settings of the video card
https://imgur.com/fCfIfir


I feel like there's an overlay over all my windows except the browser, because I can easily share other browser windows, and I can share windows from other workspaces, but if I switch to that workspace the windows are black, but I can still see the mouse over the windows, and my co-workers can see the mouse moving through the appear shared view port on appear.in

I'm getting these notifications now.

OK, this is probably just an effect of how the OS works. When you switch the workspace all other windows gets "minimized" are not drawn by the OS. For Chrome we however capture window content directly from the chrome rendering, that's why it still works. Waiting for feedback on the original issue.

I'm setting myself to reformat and reinstall my OS this weekend.  This is my primary workstation, and don't have a comparable system to work from, so I'm a little behind.  I've already backed up my system, and all data files to my NAS.  At least reinstalling is quite simple.

Thank you for providing more feedback. Adding requester "niklase@chromium.org" to the cc list and removing "Needs-Feedback" label.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

I reinstalled my OS, with 16.04.3 Desktop version from what was available today on Ubuntu's website.

Nouveau drivers don't work on my Quadro card, and had to force nouveau.modeset=0 during install to proceed, which was expected behavior on quadro cards I've used in the past.

Once installed OS, I installed the PPA graphics-drivers:  ppa:graphics-drivers/ppa, installing nvidia-375.   Installed Chrome 61 which was available from Chrome's download page, and tested it.  Still saw black screens, but then something strange happened, I moved the terminal beyond the boundary of my display on the left, and the whole window appeared.

Regular black screens, but I saw the corner of one terminal:
https://imgur.com/vItIwjA

https://imgur.com/UgRs58I


Then I moved it all the way over to the left:


https://imgur.com/hjVNUaO

https://imgur.com/86ozswq


https://imgur.com/8JO9jeI



WHen I was testing with modeset=0, I did test out chrome and it did display all the windows and terminals, as expected.  It may be specific to the video drivers.

So playing around with all these windows.  The view port of shared displays is on the top left of my display. If I push any window to the top left, it will display in the shared window.  Shared screens, and it matches the resolution of the window being shared.  The reason there's a little black bar, it's because I have a title bar AND I have a task bar on the top of the window.   This is definitely an OS/window manager/GPU issue, as it's all tied together.

Thanks for the detailed feedback, sounds like it's hard to do anything about this on our end.

I was exploring the chrome://gpu, and found this:


[19317:19317:0929/175903.823888:ERROR:gpu_video_decode_accelerator.cc(381)] : HW video decode not available for profile h264 main
[19317:19317:0929/175915.313578:ERROR:gpu_video_decode_accelerator.cc(381)] : HW video decode not available for profile h264 baseline
[19317:19317:0929/175918.972430:ERROR:gpu_video_decode_accelerator.cc(381)] : HW video decode not available for profile h264 main
[19317:19317:0929/175931.010270:ERROR:gpu_video_decode_accelerator.cc(381)] : HW video decode not available for profile h264 main
[19317:19317:0929/175945.006702:ERROR:gpu_video_decode_accelerator.cc(381)] : HW video decode not available for profile h264 main
[19317:19374:0929/180709.970261:WARNING:x11_util.cc(1353)] : X error received: serial 2591945, error_code 8 (BadMatch), request_code 154, minor_code 26 (Unknown)
[19317:19374:0929/182255.013490:WARNING:x11_util.cc(1353)] : X error received: serial 2753531, error_code 3 (BadWindow), request_code 4, minor_code 0 (Unknown)
[19317:19374:0929/182255.013522:WARNING:x11_util.cc(1353)] : X error received: serial 2753533, error_code 3 (BadWindow), request_code 4, minor_code 0 (Unknown)
[19317:19374:0929/182255.013538:WARNING:x11_util.cc(1353)] : X error received: serial 2753535, error_code 3 (BadWindow), request_code 4, minor_code 0 (Unknown)
[19317:19374:0929/182713.222461:WARNING:x11_util.cc(1353)] : X error received: serial 2791602, error_code 8 (BadMatch), request_code 154, minor_code 26 (Unknown)
[19317:19374:0929/182750.751909:WARNING:x11_util.cc(1353)] : X error received: serial 2796126, error_code 3 (BadWindow), request_code 4, minor_code 0 (Unknown)
[19317:19374:0929/182753.904746:WARNING:x11_util.cc(1353)] : X error received: serial 2796546, error_code 8 (BadMatch), request_code 154, minor_code 26 (Unknown)

BadMatch appear when I select a screen to share, the BadWindow appears when I stop sharing.


I'm grasping at straws at this point.