Bug 15997

Summary: Black screen will not come back on, even after a new KDE4 login
Product: Mageia Reporter: Bjarne Thomsen <bjarne.thomsen>
Component: RPM PackagesAssignee: Mageia Bug Squad <bugsquad>
Status: RESOLVED WORKSFORME QA Contact:
Severity: normal    
Priority: Normal CC: mageia, marja11, nic
Version: CauldronKeywords: NEEDINFO
Target Milestone: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Source RPM: KDE4 CVE:
Status comment:
Attachments: lspcidrake -v on Aopen Digital Engine hardware.
lspcidrake -v for the GIGABYTE (Intel) BRIX Pro

Description Bjarne Thomsen 2015-05-21 09:34:00 CEST
Description of problem:
When energy saving is turned on in KDE4, a black screen does not light up after mouse movements. After a re-login to KDE4 the screen stays black.
If I remove .kde4 it comes back after re-login, not very elegant.
I disabled screen energy saving. If I now manually turn off the monitor, it stays black. The only way out: log into xfce and remove .kde4!
It now works in KDE4 with the screen permanently on.

It used to work until yesterday after some updates to cauldron.

Version-Release number of selected component (if applicable):


How reproducible:
It is reproducible for this particular hardware.
Aopen Digital Engine + Dell U2414H (1920x1080, 24 bpp)
I attach lspcidrake -v

Steps to Reproduce:
1.
2.
3.


Reproducible: 

Steps to Reproduce:
Comment 1 Bjarne Thomsen 2015-05-21 09:36:26 CEST
Created attachment 6598 [details]
lspcidrake -v on Aopen Digital Engine hardware.
Comment 2 Samuel Verschelde 2015-05-21 10:05:08 CEST
Can you reproduce with other hardware? 

FYI you can see packages submitted in the last 48 hours at http://pkgsubmit.mageia.org/

I see nothing related. Can you extract from system logs the list of packages that you updated yesterday?

Keywords: (none) => NEEDINFO

Samuel Verschelde 2015-05-21 10:05:31 CEST

CC: (none) => mageia

Comment 3 Bjarne Thomsen 2015-05-21 11:27:00 CEST
I am updating 7 boxes to cauldron on a regular basis. The most interesting of these are a Brix Pro and the Aopen DE. They are both connected to the same Dell monitor. I am only sure that I discovered this problem with the Aopen box yesterday. Actually, I had already since a long time ago disabled energy saving on the Brix Pro. I could not bring it back from a black screen by moving the mouse. Instead I turn off the monitor by using the on/off button. However, the energy saving had worked with the Aopen, at least "some days" ago.

Yesterday, when I had problems turning the screen on by moving the mouse
I disabled energy saving in KDE4. I expected that I could turn the monitor on and off manually. But there was no video signal when the monitor was turned on.

This is the real new point: the monitor is black, when I turn it on.

Should I post lspcidrake -v for the Brix Pro?
I can investigate any differences between the Brix Pro and the Aopen DE.
Comment 4 Samuel Verschelde 2015-05-21 11:30:15 CEST
(In reply to Bjarne Thomsen from comment #3)
> Should I post lspcidrake -v for the Brix Pro?
> I can investigate any differences between the Brix Pro and the Aopen DE.

I think you're in the best position to investigate it, indeed, since we can probably not reproduce for now.
Comment 5 Bjarne Thomsen 2015-05-21 11:59:39 CEST
Energy saving works on an Asus Box connected to a different monitor.
I have now removed .kde4 and made a new login to see if that makes any difference.
Now I am turning to Brix and Asus.
Comment 6 Bjarne Thomsen 2015-05-21 12:54:13 CEST
Created attachment 6600 [details]
lspcidrake -v for the GIGABYTE (Intel) BRIX Pro

I made a rm -rf .kde4/ and logged into KDE4, again.
Now the screen is turned on by the mouse, after being turned off by energy saving.
I could also turn the monitor off and on manually, and the graphics came on.
So it looks as if the Brix Pro is working with KDE4.
Comment 7 Bjarne Thomsen 2015-05-21 12:56:24 CEST
I am now waiting for the Aopen DE3250 (Intel based) to turn off the screen.
Comment 8 Bjarne Thomsen 2015-05-21 13:30:22 CEST
Very interesting. The screen comes back when I move the mouse!
But when I turn off the monitor, the screen does not come back.
My monitor tells me that there is no signal from the PC.
I should press any key or move the mouse.
The only way out is Ctl-Alt-BS, and a login to Xfce,
so I can remove .kde4/

I am repeating the procedure to make sure that it repeats.
It could have been like this for a long time, as I just
moved the mouse, and it came back.
I do not know why this did not happen yesterday.

Yes, it repeats. The Aopen DE comes out of energy saving when I move the mouse.
But I have to use Ctl-Alt-BS to get the login screen back.
This problem seems to be confined to the Aopen box.
Comment 9 Nic Baxter 2016-01-04 03:16:19 CET
Are we waiting for info or should this be closed?

CC: (none) => nic

Comment 10 Marja Van Waes 2016-06-28 21:09:27 CEST
(In reply to Nic Baxter from comment #9)
> Are we waiting for info or should this be closed?

I guess it can be closed as Worksforme

@ Bjarne

Feel free to reopen if you disagree

Status: NEW => RESOLVED
CC: (none) => marja11
Resolution: (none) => WORKSFORME