AGPTEK Rocker

[wodz]

Hello!
On the latest dev. build (d64ff86) the display keeps working when backlight is off: https://imgur.com/ge7VyK6.gifv

Anyone can confirm this? I can't reproduce. Anyway which player (T6, Rocker v1, Rocker v2), which original firmware version? Are you able to hook ADB?

[johnb]

It works for me (screen off).

[Dulus_No]

Hello!
On the latest dev. build (d64ff86) the display keeps working when backlight is off: https://imgur.com/ge7VyK6.gifv

Anyone can confirm this? I can't reproduce. Anyway which player (T6, Rocker v1, Rocker v2), which original firmware version? Are you able to hook ADB?

Benjie T6, orig. firmware from 【AGPTEK】ROCKER UPT1.2 (AGPTEK_ROCKER(20171101).rar)
I think adb is working:

Code: [Select]

C:\adb>adb devices
List of devices attached
0123456789ABCDEF        device

BTW, one more for the bug/quirk list -- When audio playback starts (or resumes) there is sometimes an audible pop/click -- Several theories (codec automatically going into powersave mode?) but no way to really confirm anything since I still can't get ADB to work.  (Is there some trick involved beyond launching it via the bootloader?)

I didn't spot this pop/click but I don't use Rocker daily. Anyway I am afraid there is nothing I can do about this.

There are reports that you need to use adb older than 1.0.37 on PC. Personally I use 1.0.32 without problems. Another thing is that you cannot use ADB and run original firmware. Hiby player seems to intentionally overwrite android usb gadget settings breaking adb.

I was able to run adb v1.0.40 after manual driver install (Android ADB Interface, 08/28/2014, 11.0.0000.00000).

[wodz]

Benjie T6, orig. firmware from 【AGPTEK】ROCKER UPT1.2 (AGPTEK_ROCKER(20171101).rar)
I think adb is working:

Code: [Select]

C:\adb>adb devices
List of devices attached
0123456789ABCDEF        device

Ok, run adb shell and then issue echo 1 > /sys/class/graphics/fb0/blank. This should blank the screen obviously. Write 0 to unblank. Report if this works.

[Dulus_No]

Ok, run adb shell and then issue echo 1 > /sys/class/graphics/fb0/blank. This should blank the screen obviously. Write 0 to unblank. Report if this works.

echo 1 - backlight off, screen still displays (usb plug image) and stops refreshing (time on status bar).
echo 0 - backlight on, screen is frozen (still displays usb image), can blindly navigate and play music.

[pechenyh]

Anyone can confirm this? I can't reproduce. Anyway which player (T6, Rocker v1, Rocker v2), which original firmware version? Are you able to hook ADB?

Benjie T6, same problem. Original firmware 【AGPTEK】ROCKER UPT1.2

[wodz]

echo 1 - backlight off, screen still displays (usb plug image) and stops refreshing (time on status bar).
echo 0 - backlight on, screen is frozen (still displays usb image), can blindly navigate and play music.

So something is wrong with linux driver then. Besides it is strange you can easily see something on lcd with backlight off. Could you try to upgrade OF to 1.4 (patched with rockbox bootloader of course)?

[Dulus_No]

So something is wrong with linux driver then. Besides it is strange you can easily see something on lcd with backlight off. Could you try to upgrade OF to 1.4 (patched with rockbox bootloader of course)?

Where can I get that version?
Found it.
Hmmm... 1.4 and 1.3 files are identical to 1.1 file.
Edit:
Checked with patched 1.1, 1.06beta and 1.05beta - no difference, same reactions as

echo 1 - backlight off, screen still displays (usb plug image) and stops refreshing (time on status bar).
echo 0 - backlight on, screen is frozen (still displays usb image), can blindly navigate and play music.

Edit2: Found 1.04beta (Benjie version) and got the same reaction (on patched).

[speachy]

Another couple of bugaboos:

 * Plugging in USB _power_ always sends rockbox into "usb storage" mode, halting any playback and locking the buttons.  Holding select down when plugging in avoids this.
 * Holding down select when plugging it into a PC still results in the SD card being remotely mounted/accessible, even while rockbox is still actively playing.  This causes ...problems.

(BTW, I now have ADB running properly; turned out to be a bug in ADB itself, fixed in a newer version than I had running)

[speachy]

BTW, one more for the bug/quirk list -- When audio playback starts (or resumes) there is sometimes an audible pop/click -- Several theories (codec automatically going into powersave mode?) but no way to really confirm anything since I still can't get ADB to work.  (Is there some trick involved beyond launching it via the bootloader?)

I didn't spot this pop/click but I don't use Rocker daily. Anyway I am afraid there is nothing I can do about this.

There's a click that happens ~3s after pausing playback.  Its intensity is unaffected by the selected output volume.  It's probably due to the codec's amp being powered down after a period of silence, most likely by logic in the kernel's driver.  Changing the output port to something other than '2' (ie headphone) produces an immediate click/pop, so that approach won't work either.

So we're basically boned without the kernel sources (or the ability to roll our own..) Has anyone attempted to get them from AGPtek or Benjie?  EDIT: Saw that neither is cooperating.  A pity.

[wodz]

There's a click that happens ~3s after pausing playback.  Its intensity is unaffected by the selected output volume.  It's probably due to the codec's amp being powered down after a period of silence, most likely by logic in the kernel's driver.  Changing the output port to something other than '2' (ie headphone) produces an immediate click/pop, so that approach won't work either.

So we're basically boned without the kernel sources (or the ability to roll our own..) Has anyone attempted to get them from AGPtek or Benjie?  EDIT: Saw that neither is cooperating.  A pity.

I tried on my player and I don't get any pop. Do you happen to use very sensitve headphones?

[wodz]

* Holding down select when plugging it into a PC still results in the SD card being remotely mounted/accessible, even while rockbox is still actively playing.  This causes ...problems.

I guess this is with ADB enabled in bootloader. Try without enabling adb and report back if you still see this.

[speachy]

I tried on my player and I don't get any pop. Do you happen to use very sensitve headphones?

Dunno about "very sensitive" -- they're just a random pair of earbuds I got with a cell phone a few years ago.  The pop is also quite audible when plugged into my car's line input.  (I have the output gain set to '1' in my builds, but that didn't seem to make an appreciable difference...)

I guess this is with ADB enabled in bootloader. Try without enabling adb and report back if you still see this.

I'm seeing inconsistent results.  The last time I tried this I had adb on, and the PC didn't try to mount anything.

[Dulus_No]

I tried on my player and I don't get any pop. Do you happen to use very sensitve headphones?

I hear a pop after pause only on right channel. My headphones are iSK HP2011 (32 Ohm, 94±3dB sensitivity), Zero Audio Carbo Tenore (16 Ohm, 102dB) and Alwup UPC630 (16 Ohm, 110dB - audible noise floor on silent parts of music and on pause before pop; setting gain from 3 to 0 helps a little bit with noise).
Latest build 8742f6f made pause on headphone unplug work but it pauses after ~1 second late.

[speachy]

setting gain from 3 to 0 helps a little bit with noise

A couple of days ago I was interactively mucking with the gain settings (using amixer via adb) and it looked like only the values 1-7 had any effect -- eg set it to 7, then set it to 0, and the output doesn't change, but setting it to 1 had an immediate effect.  Can you see if this is the case for you as well?