Cannot escape blank screen (screensaver)

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Cannot escape blank screen (screensaver)

Postby matthewjake » 2018-08-27 07:00

Hi,

I'm running Debian Stretch 9.5 on my Dell 3521 laptop, and have a basic blank screen saver selected, and whenever I walk away from my laptop and the screensaver initializes I am unable to escape the blank screen by mouse or keyboard input and all I can do is power it off and then on again. I've done some googling but couldn't find this particular problem happening to others. And actually, trying to solve this in the 'screensaver preferences' application I noticed I have not activated the option 'activate screensaver when computer is idle' or 'lock screen when screensaver is active' but rather have disabled them, though i would like to of course use the screensaver feature if it was working without this error and yet when I leave the computer for a half hour I find a blank screen which I can't exit.

Would appreciate any advice. And I can give further details if required.

Matt
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Re: Cannot escape blank screen (screensaver)

Postby L_V » 2018-08-27 07:08

matthewjake wrote: have a basic blank screen saver selected, and whenever I walk away from my laptop and the screensaver initializes I am unable to escape the blank screen by mouse or keyboard input and all I can do is power it off and then on again.
Probably nothing wrong.
Two successive timings:
1 - screensaver
2 - stand-by mode
After a while (adjustable), your PC automatically switches to stand-by mode.
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Re: Cannot escape blank screen (screensaver)

Postby matthewjake » 2018-08-27 07:21

Thankyou for your reply.

The only setting in 'Power Management Preferences' I have enabled is 'Put display to sleep when inactive for:' 30 minutes.

When this blank screen happens, the lights on my laptop are set just as they are when I am normally functioning with the O/S. As compared with resuming from a suspend where the lights have a different configuration to what I'm seeing.
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Re: Cannot escape blank screen (screensaver)

Postby L_V » 2018-08-27 07:54

Did you install some specific graphic drivers (not from Debian) ?
What reports this:
Code: Select all
xset -q | egrep 'Standby|DPMS'

Code: Select all
lsblk -f | grep swap
cat /etc/initramfs-tools/conf.d/resume
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Re: Cannot escape blank screen (screensaver)

Postby matthewjake » 2018-08-27 10:29

I installed an AMD driver for my video card [AMD/ATI] Mars [Radeon HD 8730M]. I believe the driver is called 'radeon-crimson' version 15.302.

xset -q | egrep 'Standby|DPMS' - responds:

DPMS (Energy Star):
Standby: 300 Suspend: 0 Off: 600
DPMS is Enabled


lsblk -f | grep swap - responds:

├─sda10 swap c3d698ad-0e6c-4717-ad68-b94de80ecdd4 [SWAP]


cat /etc/initramfs-tools/conf.d/resume - responds:

RESUME=UUID=18cc7b29-4d94-49ff-83c4-bd9a84c73fe8
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Re: Cannot escape blank screen (screensaver)

Postby L_V » 2018-08-27 11:17

I see one big problem in case you use hibernation which cannot work.
+
Code: Select all
grep swap /etc/fstab
lspci -k | egrep -iA2 'vga|3d'
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Re: Cannot escape blank screen (screensaver)

Postby matthewjake » 2018-08-27 11:27

I have observed this error many times with no hibernation preceding it

grep swap /etc/fstab - returns:

# swap was on /dev/sda10 during installation
UUID=18cc7b29-4d94-49ff-83c4-bd9a84c73fe8 none swap sw 0 0


lspci -k | egrep -iA2 'vga|3d' - returns:

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
Subsystem: Dell 3rd Gen Core processor Graphics Controller
Kernel driver in use: i915
--
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mars [Radeon HD 8730M]
Subsystem: Dell Mars [Radeon HD 8730M]
Kernel modules: radeon
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Re: Cannot escape blank screen (screensaver)

Postby L_V » 2018-08-27 11:47

Your swap is not correct.
+
Code: Select all
sudo blkid | grep swap
free
dpkg -l firmware* | grep '^i'

Who advised you to install 'radeon-crimson' version 15.302.' ?
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Re: Cannot escape blank screen (screensaver)

Postby matthewjake » 2018-08-27 11:59

In what way do you mean my swap is not correct? Does this relate to the issue of the blank screen?

blkid | grep swap - returns:

/dev/sda10: UUID="c3d698ad-0e6c-4717-ad68-b94de80ecdd4" TYPE="swap" PARTUUID="e9ede01e-bf89-4662-99ee-2491bb0bdf27"

free - returns:

total used free shared buff/cache available
Mem: 16314964 3397176 11295624 213048 1622164 12418628
Swap: 8194044 0 8194044

it was my idea to install a video driver, so I downloaded and installed the relevant one for my type of card.
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Re: Cannot escape blank screen (screensaver)

Postby L_V » 2018-08-27 12:05

I don't understand your swap configuration / ie sda10 with different UUIDs

Code: Select all
Your fstab
# swap was on /dev/sda10 during installation
UUID=18cc7b29-4d94-49ff-83c4-bd9a84c73fe8 none swap sw 0 0

blkid | grep swap - returns:
/dev/sda10: UUID="c3d698ad-0e6c-4717-ad68-b94de80ecdd4" TYPE="swap"

lsblk -f | grep swap - responds:
├─sda10 swap c3d698ad-0e6c-4717-ad68-b94de80ecdd4 [SWAP]

+ your confirm this command returns absolutely nothing ?
Code: Select all
dpkg -l firmware* | grep '^i'

Not sure it was a great idea to not first test with radeon provided by Debian.
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Re: Cannot escape blank screen (screensaver)

Postby matthewjake » 2018-08-27 12:09

dpkg -l firmware* | grep '^i' - returns:

ii firmware-linux-free 3.4 all Binary firmware for various drivers in the Linux kernel
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Re: Cannot escape blank screen (screensaver)

Postby matthewjake » 2018-08-27 12:17

Actually to be honest, I'm uncertain as to what driver I have installed and running. I have an extracted copy of the AMD fglrx 15.302 installer in my Downloads directory but I don't know if it is installed and operational as I've been playing around with a few linux installations recently and so I don't remember precisely what was installed where, etc, also looking in synaptic it says I have the debian 'xserver-xorg-video-radeon' installed along with some other related packages.
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Re: Cannot escape blank screen (screensaver)

Postby L_V » 2018-08-27 12:25

It should work with xserver-xorg-video-radeon and firmware-amd-graphics : [ 8X00 denotes a R200 based card ]
https://dri.freedesktop.org/wiki/ATIRadeon/

Not sure your current driver is a problem, but not sure it helps....

BTW, I definitely don't understand how free command can report some swap with a UUID mismatch.

The first step should be to clarify these points before going further.
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Re: Cannot escape blank screen (screensaver)

Postby matthewjake » 2018-08-28 00:45

Thanks for your help so far, but if the swap issue is unrelated to the blank screen I would like to focus on the blank screen issue first if possible.
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Re: Cannot escape blank screen (screensaver)

Postby debiman » 2018-08-28 06:18

matthewjake wrote:The only setting in 'Power Management Preferences' I have enabled is 'Put display to sleep when inactive for:' 30 minutes.

there's many more settings in there; check them all.
maybe something is putting the machine into standby after 30min?

but it could also be an ACPI issue; this can sometimes happen, needs to be fixed once and for all.

maybe we could start with this output:
Code: Select all
sudo dmesg | grep -i acpi | grep -i 'error|fail'

but i guess we will need this much larger output also:
Code: Select all
sudo dmesg | grep -iC5 acpi
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