Linux mint unlock screen

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Screen unlock problem

Post by Ercouper » Sat Mar 10, 2018 8:49 am

I’m running Mint 18.3 and I have developed a problem with not being able to unlock screen once locked. The normal lock screen is displayed on monitor with the clock but no login box. To get out of this mode I have to CTL, ALT, F1 & login and then enter «reboot» to recover. If «never lock» is selected in preferences it will show desktop after idle period, mouse will move cursor around but mouse clicks will be ignored. CTL, ALT, F1 again to reboot and start system again. It seemed like, but I could be wrong, that the problem started after changing video cards from an ATI to an NVIDIA. Maybe coincidental (?). Any help would be appreciated as I hate to have to trash install and start over. TIA

Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.

Re: Screen unlock problem

Post by Cosmo. » Sat Mar 10, 2018 10:53 am

What is your version of Mint and what is the desktop environment ? Which kernel and which architecture? If you don’t know open a terminal and enter:

You need to give this information for every help request in every thread.
Do not forget this in the future.

Create a fresh new user account for testing and see, if the problem is reproducible there.

The fact, that you only see the clock at first is normal. Does it help if you press any key instead moving / clicking with the mouse?

Re: Screen unlock problem

Post by Ercouper » Sat Mar 10, 2018 12:08 pm

Kernel 4.13.0-36-generic x86_64 (64 bit)
Linux Mint 18.3 Sylvia
Cinnamon 3.6.6

All keys are «dead» except for CTL, ALT in combination with F keys. I believe.

Re: Screen unlock problem

Post by Hoser Rob » Sat Mar 10, 2018 12:19 pm

Ercouper wrote: ⤴ Sat Mar 10, 2018 8:49 am . It seemed like, but I could be wrong, that the problem started after changing video cards from an ATI to an NVIDIA. .

Power management and video are linked so it’s certainly possible. But I think you need to provide more info. Copy/paste these separately to the terminal and copy/paste the text output here:

ANd have you looked in Driver Manager for nvidia drivers? The one recommended there is usually the right one.

Re: Screen unlock problem

Post by Ercouper » Sat Mar 10, 2018 1:05 pm

ben@ben-System-Product-Name ~ $ inxi -Fxz
System: Host: ben-System-Product-Name Kernel: 4.13.0-36-generic x86_64 (64 bit gcc: 5.4.0)
Desktop: Cinnamon 3.6.6 (Gtk 3.18.9-1ubuntu3.3)
Distro: Linux Mint 18.3 Sylvia
Machine: Mobo: ASUSTeK model: M5A78L-M/USB3 v: Rev X.0x
Bios: American Megatrends v: 1503 date: 11/14/2012
CPU: Octa core AMD FX-8350 Eight-Core (-MCP-) cache: 16384 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 sse4a ssse3 svm) bmips: 64289
clock speeds: max: 4000 MHz 1: 1400 MHz 2: 1400 MHz 3: 1400 MHz
4: 1400 MHz 5: 2800 MHz 6: 1400 MHz 7: 1400 MHz 8: 1400 MHz
Graphics: Card: NVIDIA GT218 [GeForce 8400 GS Rev. 3] bus-ID: 01:00.0
Display Server: X.Org 1.18.4 drivers: nouveau (unloaded: fbdev,vesa)
Resolution: 1920×1080@60.00hz
GLX Renderer: NVA8
GLX Version: 3.0 Mesa 17.2.4 Direct Rendering: Yes
Audio: Card-1 NVIDIA High Definition Audio Controller
driver: snd_hda_intel bus-ID: 01:00.1
Card-2 Advanced Micro Devices [AMD/ATI] SBx00 Azalia (Intel HDA)
driver: snd_hda_intel bus-ID: 00:14.2
Sound: Advanced Linux Sound Architecture v: k4.13.0-36-generic
Network: Card: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
driver: r8169 v: 2.3LK-NAPI port: d800 bus-ID: 03:00.0
IF: enp3s0 state: up speed: 1000 Mbps duplex: full mac:
Drives: HDD Total Size: 120.0GB (49.9% used)
ID-1: /dev/sda model: OCZ size: 120.0GB
Partition: ID-1: / size: 103G used: 49G (50%) fs: ext4 dev: /dev/sda1
ID-2: swap-1 size: 8.57GB used: 0.00GB (0%) fs: swap dev: /dev/sda5
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 31.0C mobo: 29.0C
Fan Speeds (in rpm): cpu: 1271 sys-1: 0
Info: Processes: 240 Uptime: 2:02 Memory: 1095.0/7959.6MB
Init: systemd runlevel: 5 Gcc sys: 5.4.0
Client: Shell (bash 4.3.481) inxi: 2.2.35

ben@ben-System-Product-Name ~ $ sudo lshw -C video
[sudo] password for ben:
*-display
description: VGA compatible controller
product: GT218 [GeForce 8400 GS Rev. 3]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a2
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:33 memory:fd000000-fdffffff memory:d0000000-dfffffff memory:ce000000-cfffffff ioport:cc00(size=128) memory:c0000-dffff

I have tried both the X.Org drivers and the NVIDIA drivers (recommended) with identical results.

Also I have found that I can recover by CTL+ALT+F1, log in and enter «sudo service lightdm restart» but this involves a lot of typing.

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Linux mint unlock screen

Разблокировка экрана.

Как правильно задавать вопросы Правильно сформулированный вопрос и его грамотное оформление способствует высокой вероятности получения достаточно содержательного и по существу ответа. Общая рекомендация по составлению тем: 1. Для начала воспользуйтесь поиском форума. 2. Укажите версию ОС вместе с разрядностью. Пример: LM 19.3 x64, LM Sarah x32 3. DE. Если вопрос касается двух, то через запятую. (xfce, KDE, cinnamon, mate) 4. Какое железо. (достаточно вывод inxi -Fxz в спойлере (как пользоваться спойлером смотрим здесь)) или же дать ссылку на hw-probe 5. Суть. Желательно с выводом консоли, логами. 6. Скрин. Просьба указывать 2, 3 и 4 независимо от того, имеет ли это отношение к вопросу или нет. Так же не забываем об общих правилах Как пример вот

prusony Сообщения: 235 Зарегистрирован: 04 май 2017, 11:33 Решено: 4 Благодарил (а): 155 раз Поблагодарили: 66 раз Контактная информация:

Разблокировка экрана.

L-M-18.2-KDE-32b. ОСа поставлена недавно, есть проблема с разблокировкой экрана.
В «Настройка блокировки экрана» поставил 20 минут, через это время пустой черный экран, двигаю мышку — появляется курсор-стрелка, но нету экрана-приглашения вводить пароль (включена разблокировка с паролем), если курсор перемещать примерно в то место где вводить пароль, курстор-стрелка меняется на курсор-палка (I) , ввожу пароль разблокировки, курсор «I» меняется на курсор-стрелку, но экран по прежнему черный и на нем только указатель мыши (стрелка). Как-будто после ввода пароля разблокировки рабочего стола не произошло обновление экрана. Подпихните куда рыть пожалуйста.
(Если в настройках принудительно экран блокировать, потом дёрнуть мышку — всё в полном ажуре.)
Спасибо за любой ответ заранее!

Проблему решил так — вместо LM18.2-KDE поставил LM18.1-KDE. По умолчанию всё что хотел работает. Почему в 18,2 скринсейвер вешал осу — хз, не хватает знаний пока чтоб разобраться.

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Linux Mint Forums

Forum rules
There are no such things as «stupid» questions. However if you think your question is a bit stupid, then this is the right place for you to post it. Please stick to easy to-the-point questions that you feel people can answer fast. For long and complicated questions prefer the other forums within the support section.
Before you post please read how to get help. Topics in this forum are automatically closed 6 months after creation.

[SOLVED] I cant get out of LOCK SCREEN

Post by Darkhaund » Sat Dec 24, 2016 12:53 am

I have been loving «Sofar» linux mint. I am using an old Gateway laptop

CPU: Dual core Intel Core2 T5300 (-MCP-) cache: 2048 KB
flags: (lm nx pae sse sse2 sse3 ssse3) bmips: 6918
clock speeds: min/max: 800/1733 MHz 1: 1733 MHz 2: 800 MHz

Anyay. I was using xubuntu for over 2 years with alot of success. However, I found that Linux mint is more appealing.
I have googled alot of info on this issue i have with no success.

When I hit CTL-ALT-L to lock my screen. When I want to come back and I type my password, nothing happens!! Not even If i try pressing the unlock button.
I have to reboot.

The CTL-ALT-F1 think to KILL X.. does not work. Unless I am doing it wrong.
I would appreciate any help on this matter

Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.

Re: I cant get out of LOCK SCREEN

Post by Cosmo. » Sat Dec 24, 2016 5:59 am

What is your version of Mint and what is the desktop environment? If you don’t know open a terminal and enter:

If you see the dialog to enter your password you should also see a button to switch the user. Click it, this will bring you to the login screen. Select your account and try to enter the password. Does this help?

Re: I cant get out of LOCK SCREEN

Post by Darkhaund » Sat Dec 24, 2016 2:26 pm

Thank you SO VERY MUCH for posting!
I will ssend the information you request as soon as possible

I WANT to keep linux mint.. but having to reboot everything the lockscreen is up.. is annyoing

Re: I cant get out of LOCK SCREEN

Post by Darkhaund » Sat Dec 24, 2016 4:08 pm

Here is the info requested

System: Host: darktop-linuxmint Kernel: 4.4.0-53-generic i686 (32 bit)
Desktop: Cinnamon 3.2.6 Distro: Linux Mint 18.1 Serena

No matter what I do. the lock screen wont go away.. even if I hit enter, or click the unlock button.. this is very very upsetting

Re: I cant get out of LOCK SCREEN

Post by Cosmo. » Sun Dec 25, 2016 6:36 am

Try this:
If you are stuck press ctrl-alt-F1. Now enter your user name and your password. Note, that you do not get the least visual feedback, when you enter the password; type it blindly and press the Enter-key. Now enter this command:

Press ctrl-d, then alt-left. You should be back in the login screen.

Do this test: Create a fresh new user account, log out of your main account, log into the test account. Test the behavior there.

Re: I cant get out of LOCK SCREEN

Post by Darkhaund » Mon Dec 26, 2016 2:26 am

BOTH of your suggestions work

Re: I cant get out of LOCK SCREEN

Post by Cosmo. » Mon Dec 26, 2016 6:13 am

Fine that you feel, that your problem is solved, but in reality I did not provide a solution.
My first suggestion is a workaround for getting out of the situation.
My second suggestion was a step to investigate into the problem. If you say, that the problem does not appear in the test account, then there is a problem in your main account.

Re: I cant get out of LOCK SCREEN

Post by tekknj » Tue Dec 27, 2016 12:17 pm

Cosmo. wrote: Fine that you feel, that your problem is solved, but in reality I did not provide a solution.
My first suggestion is a workaround for getting out of the situation.
My second suggestion was a step to investigate into the problem. If you say, that the problem does not appear in the test account, then there is a problem in your main account.

I’m having the same problem. I will try your test. But you say its not a solution. Is this a bug being worked?

Re: I cant get out of LOCK SCREEN

Post by tekknj » Tue Dec 27, 2016 6:24 pm

Cosmo. wrote: Fine that you feel, that your problem is solved, but in reality I did not provide a solution.
My first suggestion is a workaround for getting out of the situation.
My second suggestion was a step to investigate into the problem. If you say, that the problem does not appear in the test account, then there is a problem in your main account.

I’m having the same problem. I will try your test. But you say its not a solution. Is this a bug being worked?

Try the routine and it does get me back to a new login screen without rebooting the laptop. Thanks. But as you said, this is not a solution. I did create a dummy account and the same thing happen in that account. I’m unable to exit out a the lock screen.

System:
Linux Mint 18.1 Serena 32-bit
Cinnamon 3.2.6
Dell Vostro 1000
AMD Athlon 64 X2 TK-53
ATI Xpress 1100
4GB RAM
USB HDD 32 SanDisk Cruzer Glide

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