strange monitor problem

[ovince]

Hi All,

Recently, it happens to me that the screen on my laptop lose characters in applications. For example, Thunderbird become like this

problem.png (115.66 KiB) Viewed 692 times

This happens about once per week (these I my params: mageia 5, KDE 4.14.)

Have somebody encountered this and can help me to get rid of it?

Thank you
Oliver

[doktor5000]

Which applications apart from Thunderbird are affected? And does that happen all the time or only after your box has been running for a while ?

[ovince]

I didnt pay attention but firefox is affected for sure. Maybe dolhin as well. After i restart the laptop everything is fine for about 1 or 2 weeks

[ovince]

OK. It happened again and this time I have made a list of some affected and unaffected apps. I hope it will help you to resolve this annoying problem

Affected:
- LibreOffice
- Gimp
- Thunderbird
- Firefox
- FileZilla

Unaffected:
- Dolphin
- KWrite
- Okular
- KCalc
- XGterm
- Konsole


thanks for help
oliver

[benmc]

not sure it is relevant but I had a similar issue previously.
missing whole words or lines in MCC and firefox, and invalid characters in other applications.

issue was due to driver for the graphics card.

try vesa or nouveau (if using nvidia) driver and see it that corrects the issue.

also possible that you have a failing graphics card.

[wintpe]

id agree looks like memory corruption , could be graphics memory,
or it could be the memory that one graphics toolkit has mapped, because several are in play,
the apps you suggest are all gtk, i think as a casual observation.
whereas the others are all qt.
the intermittent might be related to heat, as this is what can push an electronic fault to show its ugly face.

and the fact no one else has reported it, backs that.

id suggest run memcheck from a boot cd, and get the laptop warm and see if it starts failing

(i dont suggest you put the laptop in the oven btw, just leave it running in a warmer than usually place.)

regards peter