vusolo2 vtuner issue

[vu_duo]

Hello,

When tuning using dvb-s2 usbtuner (have tested all the releases dvb-modules todate) my stb is is turning black screen after 3-5 tunings (randomly) . Was not able to identify the issue with the image or with the dvb-s2 usbtuner driver but can confirm that older vuduo using same dvb modules and same usbtuner drivers (same release dates) do not encounter this issue. Off course cannot compare apples with oranges as the kernel in vusolo2 is different, but was noticed that vusolo2 drivers are built using similar sources as the vuduo ( just looking at the logs in dmesg). Would be great if this issue can be identified and fixed in future vusolo2 driver updates.

To explain the random tuning failure
Box is powered up , enigma2 booting process starts, then it locks a FEC with A/V working properly (and to eliminate any external software malfunction FTA channel is tested without CAM or encryption.) No issues have been observed until this point. Using enigma2, zapping is done and channel is changed to another on same sat (again everything is working as expected with SNR indicating proper signal level) After repeating this for 3-5 times, the tuner is does not open the A/V anymore, however enigma2 still indicating the SNR levels properly.
In order to fix the issue the receiver needs to be rebooted - again things are starting to work until similar behavior as described above.

Thanks for reading

 

[angelofsky1980]

Hello,

When tuning using dvb-s2 usbtuner (have tested all the releases dvb-modules todate) my stb is is turning black screen after 3-5 tunings (randomly) . Was not able to identify the issue with the image or with the dvb-s2 usbtuner driver but can confirm that older vuduo using same dvb modules and same usbtuner drivers (same release dates) do not encounter this issue. Off course cannot compare apples with oranges as the kernel in vusolo2 is different, but was noticed that vusolo2 drivers are built using similar sources as the vuduo ( just looking at the logs in dmesg). Would be great if this issue can be identified and fixed in future vusolo2 driver updates.

To explain the random tuning failure
Box is powered up , enigma2 booting process starts, then it locks a FEC with A/V working properly (and to eliminate any external software malfunction FTA channel is tested without CAM or encryption.) No issues have been observed until this point. Using enigma2, zapping is done and channel is changed to another on same sat (again everything is working as expected with SNR indicating proper signal level) After repeating this for 3-5 times, the tuner is does not open the A/V anymore, however enigma2 still indicating the SNR levels properly.
In order to fix the issue the receiver needs to be rebooted - again things are starting to work until similar behavior as described above.

Thanks for reading

I need to know what DVB-S2 USB device you are using ....

 

[vu_duo]

What is tune min_delay_ms setting recommended for usbtuner with vuplus vtuner interface ?
Is it using dvb-core to retune itself or is hardcoded to a given value ?
Also is zigzagging still used for tuning ?

e.g.

static int fe_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings *tune)
{
...
tune->min_delay_ms = 800;
}

I am now revisiting the dvb_backport.patch found with vuplus tree.
I have also sent an email to vuplus support, hope to receive an answer.
Thank you