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MediaPortal 1
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DigitalDevices Dual DVB-S2 Testing (CAM/DiSEqC)
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<blockquote data-quote="MJGraf" data-source="post: 730482" data-attributes="member: 17886"><p>Thanks glenn 1990 and Vasilich!</p><p></p><p>The problem is that I have a DD Duoflex CT (using DVB-C) and support for this card was only introduced in driver version 2.0.0.23 and later :-(</p><p>(I suppose with ".34" you, glenn 1990, also mean a 1.4.x.33 driver, which doesn't work for me...)</p><p></p><p>Just wanted to report back my findings from my test-marathon so far:</p><p></p><p>What I did first was trying to eliminate possible problems from the hardware / bios side. I therefore cleared the cmos of my bios and let all the settings in the bios to their default values. Since I read somewhere that one should leave "PCIe spread spectrum" on "disabled" for DD cards, I checked this as well: disabled is the default setting in my bios. I furthermore let the case of my htpc open because it's a relatively small case with a passively cooled HD 5450 to make sure there is no heat problem, either.</p><p></p><p>Test 1:</p><p>Still driver 2.1.1.33</p><p>Same settings in TVServer as described in my last post. DD config: only 2 DVB-C tuners enabled; CAM assigned to both tuners (alphacrypt classic)</p><p>I ran the stress test with default settings (i.e. 2 concurrent users for my 2 tuners)</p><p>SetupTV.exe ran for about an hour (about 2.000 tunes) then crashed - but no freeze.</p><p>I immediately ran it again and the system froze after only some minutes (about 200 tunes)</p><p></p><p>Test 2:</p><p>installed driver 2.1.0.30</p><p>Stress test: system freeze after about 1.500 tunes</p><p></p><p>Test 3:</p><p>installed driver 2.0.0.23</p><p>Stress test: system freeze after about 1.000 tunes (including about 200 errors caused by scrambled channels not working anymore after about 650 tunes ("channel scrambled"), which wasn't the case with newer drivers.</p><p></p><p>Test 4:</p><p>reverted back to driver 2.1.1.33</p><p>switched off "use this card for EPG grabbing" for both cards in SetupTV.</p><p>realized that stress test still shows "timeshifting (grabbing EPG)" ==> switched off "grabbing while idle" and "grabbing while timeshifting" in SetupTV</p><p>stress test (this time only showing "timeshifting"): system freeze after about 1.200 tunes</p><p></p><p>Test 5:</p><p>settings as in Test 4</p><p>stress test with only one concurrent user (the idea was that maybe the problem results from using both tuners at the same time)</p><p>==> system freeze after about 1.200 tunes</p><p></p><p>Test 6:</p><p>settings as in Test 4</p><p>stress test with two concurrent users; set "tune delay" to 5.000ms instead of 1.000ms (the idea was that maybe the hickups result from too fast channel changes - not too many)</p><p>==> system freeze after about 800 tunes</p><p></p><p>Test 7:</p><p>settings as in Test 4</p><p>changed the PCIe-bridge card to the second (of two) PCIex1 slot of my motherboard (someone mentioned that DD cards are picky with PCIe timings)</p><p>stress test with standard settings: system freeze after about 1.000 tunes</p><p></p><p>Conclusion: It indeed doesn't seem to have anything to do with EPG grabbing, just with the fact that EPG grabbing has to tune to a lot of channels; the system freeze is reproduceable with just tuning to too many channels. I will revert back to the old PCIe slot as well, since this didn't make a difference, either. Giving the card more time between the tunes ("tune delay") was also not helpful.</p><p></p><p>I'm slowly running out of ideas. If anyone has any kind of suggestion, it is more than welcome. What I still could do is make a group of only fta channels and try only these (maybe even with CI-module disconnected) or disable the second tuner completely. Anything else?!?</p><p></p><p>Thanks again for your help and patience. I'll keep on testing. I really want to nail this down...</p><p>Michael</p></blockquote><p></p>
[QUOTE="MJGraf, post: 730482, member: 17886"] Thanks glenn 1990 and Vasilich! The problem is that I have a DD Duoflex CT (using DVB-C) and support for this card was only introduced in driver version 2.0.0.23 and later :-( (I suppose with ".34" you, glenn 1990, also mean a 1.4.x.33 driver, which doesn't work for me...) Just wanted to report back my findings from my test-marathon so far: What I did first was trying to eliminate possible problems from the hardware / bios side. I therefore cleared the cmos of my bios and let all the settings in the bios to their default values. Since I read somewhere that one should leave "PCIe spread spectrum" on "disabled" for DD cards, I checked this as well: disabled is the default setting in my bios. I furthermore let the case of my htpc open because it's a relatively small case with a passively cooled HD 5450 to make sure there is no heat problem, either. Test 1: Still driver 2.1.1.33 Same settings in TVServer as described in my last post. DD config: only 2 DVB-C tuners enabled; CAM assigned to both tuners (alphacrypt classic) I ran the stress test with default settings (i.e. 2 concurrent users for my 2 tuners) SetupTV.exe ran for about an hour (about 2.000 tunes) then crashed - but no freeze. I immediately ran it again and the system froze after only some minutes (about 200 tunes) Test 2: installed driver 2.1.0.30 Stress test: system freeze after about 1.500 tunes Test 3: installed driver 2.0.0.23 Stress test: system freeze after about 1.000 tunes (including about 200 errors caused by scrambled channels not working anymore after about 650 tunes ("channel scrambled"), which wasn't the case with newer drivers. Test 4: reverted back to driver 2.1.1.33 switched off "use this card for EPG grabbing" for both cards in SetupTV. realized that stress test still shows "timeshifting (grabbing EPG)" ==> switched off "grabbing while idle" and "grabbing while timeshifting" in SetupTV stress test (this time only showing "timeshifting"): system freeze after about 1.200 tunes Test 5: settings as in Test 4 stress test with only one concurrent user (the idea was that maybe the problem results from using both tuners at the same time) ==> system freeze after about 1.200 tunes Test 6: settings as in Test 4 stress test with two concurrent users; set "tune delay" to 5.000ms instead of 1.000ms (the idea was that maybe the hickups result from too fast channel changes - not too many) ==> system freeze after about 800 tunes Test 7: settings as in Test 4 changed the PCIe-bridge card to the second (of two) PCIex1 slot of my motherboard (someone mentioned that DD cards are picky with PCIe timings) stress test with standard settings: system freeze after about 1.000 tunes Conclusion: It indeed doesn't seem to have anything to do with EPG grabbing, just with the fact that EPG grabbing has to tune to a lot of channels; the system freeze is reproduceable with just tuning to too many channels. I will revert back to the old PCIe slot as well, since this didn't make a difference, either. Giving the card more time between the tunes ("tune delay") was also not helpful. I'm slowly running out of ideas. If anyone has any kind of suggestion, it is more than welcome. What I still could do is make a group of only fta channels and try only these (maybe even with CI-module disconnected) or disable the second tuner completely. Anything else?!? Thanks again for your help and patience. I'll keep on testing. I really want to nail this down... Michael [/QUOTE]
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