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Old 12-04-2015, 10:53 AM   #1
PopSicle
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Screen flicker


PopSicle here to learn at 70 yrs of age.
I am using an LG Monitor-TV 32ln5300, I5-4430 Intel processor with 4600 GPU, ASUS Z87-PLUS Mother board running Ubuntu 15.10 OS. Had screen flicker on left side radiating upward about 6 inched from left edge. Along with the flicker were some USB -101 error messages and total lockup of Ubuntu until the USB port was turned off in bios.
I updated my bios to latest version. The screen flicker went away, the -101 error message went away, and all went very well for 3-4 weeks, the error -101 (USB 3.1) returned, slow booting, and the screen flicker returned on the opposite side of the screen (a mirror image of the left side location), and irritating to contend with. One other thing about the -101 error message is this was on the 1st motherboard which I replaced with a new one 2 months ago with a new one. I also have dual boot with Windows 10 Pro on a separate hard drive that too has the same problems with unable to access USB 3.3 and flickering. I don't use Windows 10 OS as I have written all my spread sheet micros for use in LibreOffice and simply put, I like Ubuntu much better because all the hackers are in most part, flocking to Windows to keep it filled with all kind of crap ware and virus.
Any idea what I am missing to fix the problem of screen flicker. Ironically the flicker does not happen at all while watching it in TV mode, HDMI(1) and HDMI(2) both have the problem as if some malware has infected I5-4430. Any help will be most wanted and helpful.
PopSicle
 
Old 12-05-2015, 05:51 PM   #2
ardvark71
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Quote:
Originally Posted by PopSicle View Post
Any help will be most wanted and helpful.
Hi...

Welcome to the forum

I can't guarantee I'll be able to help you solve it but I'll see what I can do.

If I had to hazard a guess at this point, since this also happens with Windows 10, I would say this would possibly be a driver issue (or lack thereof) and/or hardware defect(s).

Now for some questions...

1. If you would, please supply the exact -101 USB error message you've been receiving. If you have another monitor, can you duplicate the flickering problem?

2. Is this your motherboard?

3. If yes to #2 above, can you disable UASP support in the BIOS? If so, does that resolve the problem or do you still have to disable USB support altogether?

4. Please open a terminal and post the entire output of the following command...

Code:
lspci -nnk
Also, please supply the entire report from...

Code:
dmesg
We'll see what all of that shows.

Regards...
 
Old 12-08-2015, 03:37 AM   #3
malekmustaq
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Suggestions:

1. Try to move all signal sources away, farther, from your monitor. Digital calls converted into TV signals are susceptible to interference from modems, adaptors, power-supply, operating amplifier, all forms of micro-dynamo, APS, VHF transceiver in operation, etc. A distance of 2+ Meters can be safe enough to isolate this possible problem.

2. If you have BIOS options turn Off all USB boosters probably your monitor is not yet ready for whatever your mother board is spouting; or turn Off Version 3.0 and turn On USB v. 2.0, or vice-versa whatever is running in the configuration right now; or go USB Legacy Mode. See if the problem goes off. If it still persist, blacklist the USB driver from /etc/modprobe.

3. Still if it persists, restore what adjustments you have made, as we are certain now that the cause is from another. You may install another version or firmware for the existing HDMI ports if you think it is giving you any problem.

But any further help can be responsive only if you post up the output of "dmesg" as pointed by ardvark71 above.

Goodluck.

m.m.

Last edited by malekmustaq; 12-08-2015 at 03:46 AM.
 
Old 12-15-2015, 10:23 AM   #4
PopSicle
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Screen Flicker and USB error

First let me apologize for the long delay in replying to your posts on these matters, but the screen going dead gave me exploration time with a 22" LCD monitor and I was not able to duplicate the flicker. I also found in dmesg output several of these:
[ 0.000000] *BAD*gran_size: 128K chunk_size: 512M num_reg: 10 lose cover RAM: -256M
[ 0.000000] gran_size: 128K chunk_size: 1G num_reg: 10 lose cover RAM: 0G
[ 0.000000] *BAD*gran_size: 128K chunk_size: 2G num_reg: 10 lose cover RAM: -1G
which went away when Bios was set to ASUS Optimal.

The screen flicker was fixed when the monitor went black. It died. I did find a probable cause from TV repairman. The back light was setting% should be lowered from 100% to as low as possible. He said that if I had lowered the setting to 90% or less that I would not be at his shop. So I bought new LG 32LF5600 and set the back light to 54% which is bright enough for all functions, yet not so brilliant that the eyes hurt. I have no screen flicker nor do I expect it to return.

As touching the error -101 well the error was actually error -110 and I set the bios to ASUS Optimal setting and enabled the USB ports I disables and all is running well without the error -110. I am in what's next mode mode.
PopSicle
 
Old 12-15-2015, 12:06 PM   #5
ardvark71
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Hi...

Glad you got it squared away. If you would, please mark this thread as "SOLVED" by clicking on "Thread Tools" directly above your initial post. Thanks!

Regards...
 
  


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