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MediaPortal 1
Support
Watch / Listen Media
Television (MyTV frontend and TV-Server)
Upgraded my TV server now have live tv stuttering/pixelation
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<blockquote data-quote="mm1352000" data-source="post: 1165575" data-attributes="member: 82144"><p>Okay, thanks for the clarification.</p><p>Can you also confirm similar DPC results are seen when the network test involves another PC on your network?</p><p></p><p></p><p>To be very clear: my understanding is that the test result doesn't necessarily indicate that there's a problem with the NIC driver. It's likely... but not a guarantee. In theory any component that uses DPC handling could be causing what you see.</p><p></p><p></p><p>Disregard the fact that it worked with XP. W7 is a new environment. Lots of things changed under the hood between XP and 7. Any one of those changes may affect driver compatibility/performance such that it becomes "screwed up".</p><p></p><p></p><p>Moving forward...</p><p>From my perspective the important thing that the test has confirmed/showed is the cause of the problem <strong>when a network test is running</strong>. That cause is: "something" is starving the system of DPC handling time. Your tuner (and/or GPU) need regular/frequent DPC handling time allocations in order to function correctly. If/when they're not given that time, they're not going to be able to function correctly.</p><p></p><p>Normally the next step in the process of identifying the source of a DPC latency issue like this would be to use process of elimination to figure out which driver(s) (it could be more than one!) are causing the problem. You'd do that by removing or disabling all non-essential hardware (including your tuners!), then repeating the DPC latency test as you re-add/re-enable each device. When the DPC latency test goes red, you've found a cause of the problem. If the DPC latency for the "essential" configuration still exhibits the problem then unfortunately you may have to accept that your system isn't up to the task of real-time TV streaming.</p><p></p><p>One last thing: at this point I'm not sure if the network test is simulating/accentuating the problem that you have with HD channels when the network test is <strong>not</strong> running. It might be... but I don't think there's any way to know. It would be excellent if you could think of a way to confirm the linkage (eg. a large network file transfer while previewing TV???).</p></blockquote><p></p>
[QUOTE="mm1352000, post: 1165575, member: 82144"] Okay, thanks for the clarification. Can you also confirm similar DPC results are seen when the network test involves another PC on your network? To be very clear: my understanding is that the test result doesn't necessarily indicate that there's a problem with the NIC driver. It's likely... but not a guarantee. In theory any component that uses DPC handling could be causing what you see. Disregard the fact that it worked with XP. W7 is a new environment. Lots of things changed under the hood between XP and 7. Any one of those changes may affect driver compatibility/performance such that it becomes "screwed up". Moving forward... From my perspective the important thing that the test has confirmed/showed is the cause of the problem [B]when a network test is running[/B]. That cause is: "something" is starving the system of DPC handling time. Your tuner (and/or GPU) need regular/frequent DPC handling time allocations in order to function correctly. If/when they're not given that time, they're not going to be able to function correctly. Normally the next step in the process of identifying the source of a DPC latency issue like this would be to use process of elimination to figure out which driver(s) (it could be more than one!) are causing the problem. You'd do that by removing or disabling all non-essential hardware (including your tuners!), then repeating the DPC latency test as you re-add/re-enable each device. When the DPC latency test goes red, you've found a cause of the problem. If the DPC latency for the "essential" configuration still exhibits the problem then unfortunately you may have to accept that your system isn't up to the task of real-time TV streaming. One last thing: at this point I'm not sure if the network test is simulating/accentuating the problem that you have with HD channels when the network test is [B]not[/B] running. It might be... but I don't think there's any way to know. It would be excellent if you could think of a way to confirm the linkage (eg. a large network file transfer while previewing TV???). [/QUOTE]
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Upgraded my TV server now have live tv stuttering/pixelation
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