NVDA randomly goes silent, braille still works, active window unknown #8638
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Is it in any context, ie not just Chrome?
It almost looks like the sort of behaviour you get with some malware
screensaver graphics programs, where a screen with graphics can pop up and
show ads.
It certainly does not seem to communicate with anything and getting to
minimise it is often impossible without a mouse.
Just a thought.
Brian
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I just ran a scan and found no malware. Plus, where braille continues to work as expected, I doubt it's a program taking over. I've only noticed it in Chrome thus far, but that's mostly because if my computer is left alone, it will be left with Crhome in focus more often than any other program. This is a work machine, so I'm limited in the time I can leave the computer alone, but I'll try a different program during lunch today and see what happens. |
btw: Please tell us more information about your system. Use the issue draft for more details how to do so. Thanks. |
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Here's the system information. Apologies for not completing this initially. Steps to reproduce:
Actual behavior:NVDA remains silent despite, according to braille, working properly. This will take some time to start. The current window also shows as "legacy unknown", but returns to normal if you alt-tab away from, then back to, Chrome. Expected behavior:NVDA should run normally, not do what it does here. System configuration:NVDA Installed/portable/running from source:standard install NVDA version:2018.2.1 Windows version:Windows 10, 1803 Name and version of other software in use when reproducing the issue:Chrome Version 68.0.3440.106 (Official Build) (64-bit) Other information about your system:Dell PC with spinning drive, used at work. Using Orbit Reader 20 via USB. Other questions:Does the issue still occur after restarting your PC?yes Have you tried any other versions of NVDA?no |
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Update: it happened again. Using braille, I changed the synthesizer to SpeechPlayer. When I hit OK in the synthesizer selection dialog, NVDA stopped working completely. I had no braille and no speech. I restarted with alt-control-n, and my speech was still eSpeak. I guess the change didn't save. Also, when I was changing settings, I noticed that the list of settings categories and the read-only text field showing the current speech synthesizer failed to appear on my display. After restarting NVDA, both work as expected. |
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Could you remember when this strange scenario occurred the very first time? What happened immediately before this? To be honest, I have absolutely no idea what's going wrong on your system. You still can create a new user account and run NVDA as a portable version in it (just for testing). But as NVDA 2018.3 will be released shortly, I recoomend you to wait for it because of #8405. Please follow the NVDA blog to get informed when 2018.3 RC1 was released for testing. |
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I can test on another account, but I can't spare the time to do so at will. I'll try to remember to do that next time my machine will be alone for a while while still logged in. The first time was August 13 or 14, I don't know which. I was doing nothing. I logged in after my computer had been locked, and found I had no speech, but I did have braille. Then the same thing happened after a period of inactivity, no log off or locking necessary. It's been that way ever since, happening randomly during inactivity and/or when I unlock it. I have no clue either. I'll await 2018.3, and see if clearing up the other problems on my system fixes this one. That may well be the answer, with this bug being a consequence of some larger problem and not an independent issue. |
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Integrated Graphics Card also need drivers to run.Windows 8 and above may
update them silently during Windows Update.
…On Fri, Aug 17, 2018 at 11:57 PM, Alex Hall ***@***.***> wrote:
Here's the system information. Apologies for not completing this initially.
Steps to reproduce:
1. Open Chrome.
2. Leave the computer alone, with NVDA active. Attach a braille
display to be able to continue to use NVDA once the problem occurs.
Actual behavior:
NVDA remains silent despite, according to braille, working properly. This
will take some time to start. The current window also shows as "legacy
unknown", but returns to normal if you alt-tab away from, then back to,
Chrome.
Expected behavior:
NVDA should run normally, not do what it does here.
System configuration: NVDA Installed/portable/running from source:
standard install
NVDA version:
2018.2.1
Windows version:
Windows 10, 1803
Name and version of other software in use when reproducing the issue:
Chrome Version 68.0.3440.106 (Official Build) (64-bit)
Other information about your system:
Dell PC with spinning drive, used at work. Using Orbit Reader 20 via USB.
Other questions: Does the issue still occur after restarting your PC?
yes
Have you tried any other versions of NVDA?
no
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I'm experiencing something similar for Visual Studio Code, which uses Electron. I'm not sure if its related. See microsoft/vscode#28316 |
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NVDA 2018.3 Beta 3 was released yesterday. I wouldn't install it, but you can create a portable version from it. Use it on your own risk. It isn't a RC. btw: If you don't need Java JRE anymore, please uninstall it for security reasons. The latest version is 8.0 Update 181. |
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Quick update: the same problem just happened while Notepad Plus Plus was the active window, not Chrome. I don't expect this to help at all, but wanted to document it here just in case. |
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Does this issue also occur when the Audio Theme add-on is disabled/uninstalled? |
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I've had it disabled for a couple days, well before the latest instance of the problem this morning. My call with Microsoft Accessibility to sort out a few other problems not specific to NVDA is this afternoon, so I'll see if fixing that helps this. Here's hoping things are fixed today. |
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@mehgcap, @Neurrone are you still having this issue? I am asking because I had it too months ago but it went away after some Windows updates came. Did you try to see if the com registry fixing tool in nvda menu / tools solves the problem? In case not, maybe it is a sound card issue. Try to install the bluetooth audio add-on from the official website and see if the speech still interrupts. The add-on is called bluetooth audio but it helps in cases where the sound card goes silent, especially when you live your PC inactive for more seconds / minutes. |
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And update to last Windows 10 build. This is always good because it seems that some issues were solved just by updating Windows 10. |
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I get this infrequently still in 1809, but I haven't made any progress narrowing down what's causing it. |
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I've gotten similar behavior, where the window is unknown, then I lose speech and braille after a period of sluggishness from NVDA. Restarting Firefox or Notepad Plus Plus always sorts it out. I'm not sure if this is an evolution of the initial problem or a new one. I just noticed the comment about the COM fixing tool, and ran it. I'll see if it makes a difference. I should also say that I'm now back to using Firefox over Chrome. My Windows and NVDA versions are both fully up-to-date. |
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@mehgcap did the com registry fixing tool solve your problem? How is the behavior in NVDA 2019.3 Beta 1? |
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I'm not experiencing this anymore, the VS Code issue I referenced above has been fixed. |
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Thanks for the update. Closing as works for me. |
First, note that this problem may well be on just my machine. I'm having other problems which affect NVDA as well as Narrator. Still, in case it helps, here it is.
Recently, I've noticed that NVDA will go silent at random times. It may be random, it may be if I leave it alone for a set time, it may be something else. Whatever it is, braille works perfectly, but I lose all speech. Restarting NVDA puts things right, for a while. When this happens, the active window is suddenly "unknown".
Below is the log taken seconds after this happened most recently. The last thing in the log above this was from almost an hour before, and had to do with caret movement in a Sentilla window. I doubt it's related. NVDA was focused on Chrome, when my braille display changed to show Chrome was now an unknown window. Anyway, the log:
Developer info for navigator object:
name: None
role: ROLE_UNKNOWN
states:
isFocusable: False
hasFocus: False
Python object: <NVDAObjects.IAccessible.IAccessible object at 0x0543F050>
Python class mro: (<class 'NVDAObjects.IAccessible.IAccessible'>, <class 'NVDAObjects.window.Window'>, <class 'NVDAObjects.NVDAObject'>, <class 'documentBase.TextContainerObject'>, <class 'baseObject.ScriptableObject'>, <class 'baseObject.AutoPropertyObject'>, <type 'object'>)
description: None
location: None
value: None
appModule: <'appModuleHandler' (appName u'chrome', process ID 35080) at address 4ca1cf0>
appModule.productName: exception: No version information
appModule.productVersion: exception: No version information
TextInfo: <class 'NVDAObjects.NVDAObjectTextInfo'>
windowHandle: 10225446
windowClassName: u'Chrome_RenderWidgetHostHWND'
windowControlID: 163609328
windowStyle: 1445986304
windowThreadID: 35336
windowText: u'Chrome Legacy Window'
displayText: exception: 'NoneType' object is not iterable
IAccessibleObject: <POINTER(IAccessible) ptr=0x4e95adb8 at 5148b70>
IAccessibleChildID: -1554937
IAccessible event parameters: windowHandle=10225446, objectID=-4, childID=-1554937
IAccessible accName: exception: (-2147024809, 'The parameter is incorrect.', (None, None, None, 0, None))
IAccessible accRole: exception: (-2147024809, 'The parameter is incorrect.', (None, None, None, 0, None))
IAccessible accState: exception: (-2147024809, 'The parameter is incorrect.', (None, None, None, 0, None))
IAccessible accDescription: exception: (-2147024809, 'The parameter is incorrect.', (None, None, None, 0, None))
IAccessible accValue: exception: (-2147024809, 'The parameter is incorrect.', (None, None, None, 0, None))
I recently installed the audio themes and braille extender add-ons, if that matters. I have not yet disabled both to see if that helps, as this problem is intermittent already and thus takes a while to test. However, I do have the audio themes add-on off, and did when this most recent incident occurred.
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