https://openphdguiding.org/getting-help/
You also need to be sure you’re running the latest camera drivers.
Bruce
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We can’t help you if you don’t send the logs. That’s what the link is for.
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Ok, let’s see if we can put together a reasonable picture of your problems. Here’s what it looks like to me:
I think you should go back to the software configuration you had on 2/18 – which was working fine – and start trouble-shooting from there. Use the native QHY driver, not the ASCOM version. That software didn’t change on its own during your 3-week layoff, but something in your hardware environment probably did. The trouble-shooting guide in the PHD2 manual – Trouble-shooting/Camera timeouts – is the best help we can give you. It’s going to be important to work through both sides of the problem – both the data transfer part and the camera power part.
The fact that the cameras work with SharpCap tells you only one useful thing: the cameras aren’t dead, they can take pictures. Apps like SharpCap interact with the camera in a completely different way than PHD2 – they basically start a video stream, let it run for as long as you like, then stop it. PHD2 needs to take single exposures with the camera, and that involves much more back-and-forth control traffic with the camera – and those round-trip communications are more prone to timing and hardware-related problems in the USB system.
Hope you can track it down quickly,
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What do you mean “without any signs that PHD2 is doing anything”. This makes no sense. It either connects to the camera or it doesn’t. If it doesn’t, it tells you that. When you start looping, it either gets camera frames within the expected time period or it doesn’t. When it doesn’t, it tells you that unless you’ve disabled the alerts. If it says ‘looping’, it’s getting camera frames. You have to be very careful and systematic when you work through these tests or you’ll just end up chasing your tail. You can open a PHD2 debug log file after a test and search for ‘alert’ to see if problems were recorded.
Bruce
From: open-phd...@googlegroups.com [mailto:open-phd...@googlegroups.com] On Behalf Of Wayne Stronach
Sent: Monday, March 15, 2021 8:23
PM
To: Open PHD Guiding
Subject: Re: [open-phd-guiding]
QHY5 camera and PHD2 - don't play togther anymore
Thanks Bruce, I have spend about 8 hours trying different cables, USB ports, powered hubs, drivers etc without any signs that PHD2 is doing anything - I brought a new camera as I ended up thinking that the QHY5II-c was faultly but get the same problem with a QHY5III178 which uses USB 3.0 so completely different hardware. I have gone back to where I started (as you suggest) and most of the time try the QHY native driver (rather than ASCOM) but still no luck - While nothing had changed in my hardware, in the three week layoff period, windows was still undating itself and I wonder whether windows is somehow limiting access to the camera. I will try a new computer next - PHD2 was easy to setup the first time.
On Tuesday, 16 March 2021 at 16:03:06 UTC+13 bw_m...@earthlink.net wrote:
Ok, let’s see if we can put together a reasonable picture of your problems. Here’s what it looks like to me:
1. On 2/18 (not 2/21), you ran all night without any camera problems. You were using PHD2 2.6.9dev4 and the native QHY camera driver connected to a QHY5PII-c camera
2. On 3/13, 3 weeks later, you connected to the same camera in the same way, You then started having camera timeout problems – nothing mysterious that I can see, the alert messages should have given you a good place to start trouble-shooting. You got the same intermittent timeout problems during both daytime and nighttime use
3. On 3/16, you started flailing around with different PHD2 releases and different QHY camera drivers – ASCOM instead of the native driver. So this introduced new software variables into a situation that seems most likely to be a USB-related hardware problem.
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Excellent suggestion! That’s why we include this in the trouble-shooting steps:

Hope you’ve found a solution…
Bruce
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If you’re running Windows 10, it’s entirely possible an update decided to “help you out” with power management. Those aren’t BIOS changes, they are higher-level settings in Windows. You can open the Device Manager and navigate to the ‘USB Root Hub” entries. Right click on each one and look at the ‘Power Management’ tab – you will probably find they can be turned off by Windows to save power. Or you can come at it another way – go into Settings/Hardware and Sound/Power Options/Edit Plan Settings/USB settings/USB selective suspend setting. The default value there is to allow selective suspension even if you’re running on AC power. Any way you slice it, you don’t want these ports being disabled.
My approach with Windows 10 on my astronomy laptop is to control exactly when the updates are going to be done – for example, every 30 days at noon. The laptop isn’t used for general surfing, only for imaging, so the security exposure is minimal and I don’t have anything on the system that’s sensitive. Once an update is done, I march through a list of known areas to make sure the update hasn’t stepped on something. It’s annoying but it’s better than getting the kind of surprise that may have caused your problems.
Hope you’ve gotten this problem behind you for now assuming it has been correctly identified.
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