POCKETBOOK Touch Lux 4 touchscreen not working after update

marie00 · 08-15-2020, 07:24 AM

Hello all,

Yesterday i had a prompt to update to the newest firmware, so I downloaded it via WiFi and then started the update.

Now the touchscreen has a strange behavior. It's working randomly if i touch my screen with two fingers.

Physical button are working well.

What i tried :

- Install all available update.
- Factory reset
- push twice on the menu button to disable and enable the touchscreen

Still same.

Any ideas ?

nhedgehog · 08-15-2020, 12:03 PM

Quote:

Originally Posted by marie00

Hello all,

Yesterday i had a prompt to update to the newest firmware, so I downloaded it via WiFi and then started the update.

Now the touchscreen has a strange behavior. It's working randomly if i touch my screen with two fingers.

Physical button are working well.

What i tried :

- Install all available update.
- Factory reset
- push twice on the menu button to disable and enable the touchscreen

Still same.

Any ideas ?

Somewhere in the settings should be a "calibrate touchscreen" menu item.
I would try this.

marie00 · 08-15-2020, 12:14 PM

I tried, still same.

nhedgehog · 08-15-2020, 02:09 PM

Did you try to downgrade?

marie00 · 08-16-2020, 02:02 AM

Yes tried all firmware from here :
http://www.pocketbook-int.com/ge/sup...ok-touch-lux-4

nhedgehog · 08-16-2020, 04:35 AM

Quote:

It's working randomly if i touch my screen with two fingers.

That I don't understand.
Touching it with only one finger is working fine?

marie00 · 08-16-2020, 05:32 AM

No if i touch the screen with one finger, it's not working. I have to touch the screen with two fingers and after many try, one of my finger is recognized.

nhedgehog · 08-16-2020, 06:04 AM

Quote:

Originally Posted by marie00

No if i touch the screen with one finger, it's not working. I have to touch the screen with two fingers and after many try, one of my finger is recognized.

The chances that this behaviour is related to the firmware update is really minimal. Sounds for me like a broken touch layer. Guess only the service may help via screen replacement. I usually test the touch functions on my devices with the scibble app.

jaskie · 09-05-2020, 07:17 AM

It was happen to me, too, in a device I replaced screen.
Pocketbook Touch Lux 4 was manufactured with at least two LCD panels: ED060XH7 and EX060XCD. The latter (and probably later) have touch sensor glued on top of the screen, previous have the sensor secured under thin glass layer. These panels are electrically and mechanically fully compatible, so it's possible to replace each with the other. As ED060XCD is almost unavailable to buy, I replaced it with ED060XH7. It was working OK, I glued everything happy, and performed firmware upgrade - the touch failed exactly as yours.
After some deeper digging, replacing touch chip, connecting console to two pocketbooks with different panels, I noticed difference in settings for the panels in Pocketbook Linux firmware: console command /bin/hwconfig shows

device_touchpanel=8 for PB manufactured with ED060XH7
device_touchpanel=16 for EX060XCD

I don't know how to change this setting.
I noticed that firmware upgrade process stores initial settings in touch panel chip, so it's the reason for the failure after upgrade. The upgrade probably uses device_touchpanel to determine values to store.

HOW TO FIX your PB with no tools:
You have to connect the touch panel connector (only) to another pocketbook which have proper setting to your panel and force firmware upgrade on the pocketbook. The correct data will be saved in touch chip. This can be done relatively easy, only with opening rear cover of the both pocketbooks. To force firmware upgrade save the firmware on SD card, insert it to pocketbook at switch it on holding both "next" and "previous" physical buttons.
The touch panel type is printed on screen (largest) connector of the panel (you will have to disconnect it to check), the touch connector is on the opposite side.
If it's working, disable firmware upgrade, as it can break it in future.

jaskie · 05-17-2023, 05:39 PM

Now I also know the difference between ED060XH7 and ED060XCD that causes this behaviour: its because of location of touch panel in screen stack:

in ED060XH7 the touchpanel is glued almost directly to bottom screen surface (there is only very thin separating film between them),

in ED060XCD the touch is glued on top of the display.

And in the middle is quite thick layer of plastic used to distribute backlight, so in case of XCD-mainboard the panel should be much less sensitive than for XH7.

pocketpicker · 06-26-2023, 06:23 PM

I had similar problems with a rooted Pocketbook Lux5. The update ended with an error message "update failed". I could restart the device but the touch function rendered unusable. But luckily WLAN and SSH were functional.
So I determined two files with immutable attribut. (lsattr -R 2>/dev/null | grep i--)
And removed the attribut (sudo chattr -i <file name>)
I restarted the update process once more (I had to press the forward and backward button and push the power button for few seconds)
The update finished without errors. The device started again. The touchpad was full functional. I had to unroot and root the device again.

Vvelin · 11-08-2023, 06:52 AM

Hi, i have a Problem after updating the firmware pb628 touch lux 5
After update touch screen work with two fingers try to download it without success can you help me somebody
Which number I must install to correct the problem

Vvelin · 11-08-2023, 07:48 AM

i mean try do downgrade withmore ot 4 kind of old firmware

Vvelin · 11-08-2023, 07:50 AM

hi, buddy , do you find a solution to downgrade pb 628?
wich version if you success?
pls help me.

Quote:

Originally Posted by pocketpicker

I had similar problems with a rooted Pocketbook Lux5. The update ended with an error message "update failed". I could restart the device but the touch function rendered unusable. But luckily WLAN and SSH were functional.
So I determined two files with immutable attribut. (lsattr -R 2>/dev/null | grep i--)
And removed the attribut (sudo chattr -i <file name>)
I restarted the update process once more (I had to press the forward and backward button and push the power button for few seconds)
The update finished without errors. The device started again. The touchpad was full functional. I had to unroot and root the device again.

jrw174 · 11-09-2023, 09:36 AM

If the device was rooted ( I had a similar issue on my Era) you need to download this release of the PB root
https://github.com/ezdiy/pbjb/releases/tag/v6

This has an Uninstall script that you can run.

To fix this I did this:

1. Put the files in the /application folder
2. Assuming the root is still somewhat installed, ssh to this folder.
3. Run the JailBreak.app
4. Run the services.ap
5. Run the Uninstall.app
6. Delete the /mnt/secure/su folder
7. Try to do the force update/reset with the buttons again
8. Once it starts give it 5 or so minutes. I noticed it took a while to have the touch screen react again

08-15-2020, 07:24 AM	#1
marie00 Junior Member Posts: 4 Karma: 10 Join Date: Aug 2020 Device: PocketBook Touch Lux 4	POCKETBOOK Touch Lux 4 touchscreen not working after update Hello all, Yesterday i had a prompt to update to the newest firmware, so I downloaded it via WiFi and then started the update. Now the touchscreen has a strange behavior. It's working randomly if i touch my screen with two fingers. Physical button are working well. What i tried : - Install all available update. - Factory reset - push twice on the menu button to disable and enable the touchscreen Still same. Any ideas ?

09-05-2020, 07:17 AM	#9
jaskie Junior Member Posts: 2 Karma: 53198 Join Date: Sep 2020 Device: Pocketbook Touch Lux 4	It was happen to me, too, in a device I replaced screen. Pocketbook Touch Lux 4 was manufactured with at least two LCD panels: ED060XH7 and EX060XCD. The latter (and probably later) have touch sensor glued on top of the screen, previous have the sensor secured under thin glass layer. These panels are electrically and mechanically fully compatible, so it's possible to replace each with the other. As ED060XCD is almost unavailable to buy, I replaced it with ED060XH7. It was working OK, I glued everything happy, and performed firmware upgrade - the touch failed exactly as yours. After some deeper digging, replacing touch chip, connecting console to two pocketbooks with different panels, I noticed difference in settings for the panels in Pocketbook Linux firmware: console command /bin/hwconfig shows device_touchpanel=8 for PB manufactured with ED060XH7 device_touchpanel=16 for EX060XCD I don't know how to change this setting. I noticed that firmware upgrade process stores initial settings in touch panel chip, so it's the reason for the failure after upgrade. The upgrade probably uses device_touchpanel to determine values to store. HOW TO FIX your PB with no tools: You have to connect the touch panel connector (only) to another pocketbook which have proper setting to your panel and force firmware upgrade on the pocketbook. The correct data will be saved in touch chip. This can be done relatively easy, only with opening rear cover of the both pocketbooks. To force firmware upgrade save the firmware on SD card, insert it to pocketbook at switch it on holding both "next" and "previous" physical buttons. The touch panel type is printed on screen (largest) connector of the panel (you will have to disconnect it to check), the touch connector is on the opposite side. If it's working, disable firmware upgrade, as it can break it in future.

05-17-2023, 05:39 PM	#10
jaskie Junior Member Posts: 2 Karma: 53198 Join Date: Sep 2020 Device: Pocketbook Touch Lux 4	Follow-up Now I also know the difference between ED060XH7 and ED060XCD that causes this behaviour: its because of location of touch panel in screen stack: in ED060XH7 the touchpanel is glued almost directly to bottom screen surface (there is only very thin separating film between them), in ED060XCD the touch is glued on top of the display. And in the middle is quite thick layer of plastic used to distribute backlight, so in case of XCD-mainboard the panel should be much less sensitive than for XH7.

11-08-2023, 06:52 AM	#12
Vvelin Junior Member Posts: 4 Karma: 10 Join Date: Nov 2023 Device: Touch lux 5	Problem after updating the firmware pb628 touch lux 5 Hi, i have a Problem after updating the firmware pb628 touch lux 5 After update touch screen work with two fingers try to download it without success can you help me somebody Which number I must install to correct the problem

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08-15-2020, 12:14 PM	#3
marie00 Junior Member Posts: 4 Karma: 10 Join Date: Aug 2020 Device: PocketBook Touch Lux 4	I tried, still same.

08-15-2020, 02:09 PM	#4
nhedgehog Guru Posts: 771 Karma: 625816 Join Date: Sep 2013 Device: EnergySistemEreaderPro, Nook STG, Pocketbook 622, Bookeen Cybooks ...	Did you try to downgrade?

08-16-2020, 02:02 AM	#5
marie00 Junior Member Posts: 4 Karma: 10 Join Date: Aug 2020 Device: PocketBook Touch Lux 4	Yes tried all firmware from here : http://www.pocketbook-int.com/ge/sup...ok-touch-lux-4

08-16-2020, 05:32 AM	#7
marie00 Junior Member Posts: 4 Karma: 10 Join Date: Aug 2020 Device: PocketBook Touch Lux 4	No if i touch the screen with one finger, it's not working. I have to touch the screen with two fingers and after many try, one of my finger is recognized.

06-26-2023, 06:23 PM	#11
pocketpicker Junior Member Posts: 1 Karma: 10 Join Date: Jun 2023 Device: PB628	I had similar problems with a rooted Pocketbook Lux5. The update ended with an error message "update failed". I could restart the device but the touch function rendered unusable. But luckily WLAN and SSH were functional. So I determined two files with immutable attribut. (lsattr -R 2>/dev/null \| grep i--) And removed the attribut (sudo chattr -i <file name>) I restarted the update process once more (I had to press the forward and backward button and push the power button for few seconds) The update finished without errors. The device started again. The touchpad was full functional. I had to unroot and root the device again.

11-08-2023, 07:48 AM	#13
Vvelin Junior Member Posts: 4 Karma: 10 Join Date: Nov 2023 Device: Touch lux 5	i mean try do downgrade withmore ot 4 kind of old firmware

11-09-2023, 09:36 AM	#15
jrw174 Connoisseur Posts: 78 Karma: 7126 Join Date: May 2023 Device: PocketBook Era	If the device was rooted ( I had a similar issue on my Era) you need to download this release of the PB root https://github.com/ezdiy/pbjb/releases/tag/v6 This has an Uninstall script that you can run. To fix this I did this: 1. Put the files in the /application folder 2. Assuming the root is still somewhat installed, ssh to this folder. 3. Run the JailBreak.app 4. Run the services.ap 5. Run the Uninstall.app 6. Delete the /mnt/secure/su folder 7. Try to do the force update/reset with the buttons again 8. Once it starts give it 5 or so minutes. I noticed it took a while to have the touch screen react again

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