asked 2013-12-26 20:23:50 +0300
Hi there,
I had this only once in two days and sadly I can not reproduce it, but it has happened: I have double tapped on the device, I could see that the background light went on but the screen stayed black. When I swiped over the screen I heard the clicking of a pulley menu: the phone was thinking that it would be operating properly.
Temporary solution
Swipe down from top, like go to sleep and then double tap again.
answered 2013-12-26 20:47:44 +0300
Where you by any chance on Wifi before and lost signal? I noticed that the UI tends to lock up when changing connection.
I was 3 meters from the router away and there is full signal in the spot I held the phone when it happened. But I can't say for sure because the screen was black 8)
hardcodes.de ( 2013-12-26 20:50:31 +0300 )And I have 3G disabled, so there will be just the WIFI network and no changes going on.
hardcodes.de ( 2013-12-26 20:51:31 +0300 )I've encountered this problem also few times. With 3G connection on and WiFi tethering on. Phone was charging last time but can't remember the times before.
Tobiski ( 2013-12-29 00:34:36 +0300 )I can confirm that things get bad when there is both WiFi and 3G enabled at the same time.
vbmithr ( 2014-01-05 22:56:27 +0300 )I have encountered this problem also, on several occasions. I usually have both WiFi and 3G on, and think the device should work in this mode without problems. I hope no one is suggesting this is a "feature" ;)
sepantt ( 2014-01-14 08:44:11 +0300 )answered 2015-01-31 23:15:50 +0300
I don't know if it's related to this problem (like this one with the black screen https://together.jolla.com/question/16433/bug-black-screen/) but I have got black covers on the Messages and Phone app after using symlinks to store camera pictures and videos on SD card instead of phone memory. It happens only when using a short delay like sleep 1 and not sleep 5 (subject about this: https://together.jolla.com/question/17691/camera-cant-store-pictures-to-sd-card/#57101).
Update: It also happens randomly after some time, without doing anything special, so it's not necessarily tied to the SD card symlinks. I had the feeling that the black covers appear more when doing several actions like opening an app and then swiping fast to go directly to open apps, connecting to the network after being on flight mode or locking the screen with the hardware button instead of swiping from the top to lock screen. Maybe we can see the problem with dbus-monitor command but I haven't found anything at the moment. In fact, this is a known bug (https://together.jolla.com/question/72000/bug-black-cover-for-dialer-and-messaging-app/ https://together.jolla.com/question/74971/u10-vaarainjarvi-11127-pls-addlist-of-regression-issues/ https://together.jolla.com/question/71741/release-notes-software-version-11127-vaarainjarvi/).
I didn't have this bug with Jolla updates before the current 1.1.1.27. Like some comments I read, the bug can disappear after you swipe to the events from the bottom or to the ambience favorites from the left or right.
After reboot, it is completely gone. For information, here is what a black cover on Messages app looked like:
and here is a weird thing I've found after swiping from ambience favorites to the open applications when having a black cover active, there's a sort of mouse cursor that quickly appears on the black cover:
@tathhu thanks for this reminder, I didn't pay attention and when I searched if the problem existed by searching "jolla black cover" on a search engine, I found nothing. I should have searched "jolla black cover bug" or directly use together.jolla.com search bar. This problem still gives an annoying user experience, I hope it's fixed ASAP.
baptx ( 2015-02-01 16:33:19 +0300 )answered 2014-03-03 23:09:27 +0300
This has happened a few times for me. And always when the phone was on mobile network only (ie. no WLAN). For some reason swipe down doesn't work for me. Temporary solution for me: swipe up (which gives the Events screen), swipe up again and everything is back to normal.
answered 2014-03-22 19:40:45 +0300
The frame buffer content is lost when display is powered off. In order not to show random pixels the display driver keeps backlight off untill the screen content is updated -> the backlight comes on with black display -> something black was drawn. And there at least used to be problems with "fade to black" animation used with the swipe from top gesture.
See https://together.jolla.com/question/22705/phonedisplay-fails-to-wake-up-after-having-slept-a-while/
answered 2014-09-09 15:30:34 +0300
It gets worse if I remove the micro sd card ?!
Asked: 2013-12-26 20:23:50 +0300
Seen: 1,610 times
Last updated: Feb 01 '15
I have both the above thing (not every time, and I haven't found a "pattern" for when it appears), and something similar when I swipe-down-to-turn-screen-off: I swipe down, the screen turns off, then one second or less (I haven't timed it) later, the screen turns on again, and I have to swipe down again. Unfortunately, I haven't noticed a pattern here either (not that I've looked, though).
(and no WiFi, just mobile data)
phle ( 2014-01-14 17:00:26 +0300 )I have experienced the black screen issue, but that only recently, I think it may have to do with warehouse or packages installed from there.
Trizt ( 2014-01-21 20:29:42 +0300 )@Trizt: I definitely had this problem before installing warehouse or packages from openrepos. I haven't had the problem during the last 2 - 3 weeks. Before it occurred multiple times a day.
Jörg ( 2014-01-22 10:07:20 +0300 )@Jörg: Today I experienced the opposite, the screen didn't want to shut down, had always to turn it off manually (swipe from top or button), until I rebooted. Of course that is most likely unrelated to this issue.
Trizt ( 2014-01-22 20:34:39 +0300 )@Trizt: You are not alone ;-) I had this problem also. Hopefully the next update will resolve some of these issues ...
Jörg ( 2014-01-23 11:17:04 +0300 )