Linux Lite Forums

Software - Support => Installing Linux Lite => Topic started by: Larry Stehno on July 19, 2021, 04:14:58 PM

Title: Display With Horizontal White Bars
Post by: Larry Stehno on July 19, 2021, 04:14:58 PM

I just installed Linux Lite 5.4 on a HP Pro 3420 All-In-One PC.  The install went well with a normal display but it has horizontal white bars running up and down over the display.  I ran a update but no change.  I checked for third party drivers and none were found thinking another video driver is needed.  Any ideas for getting rid of these white bars?  thanks,
Planorez 

Title: Re: Display With Horizontal White Bars
Post by: Jerry on July 19, 2021, 04:17:30 PM

We'll need to see a screenshot.

Title: Re: Display With Horizontal White Bars
Post by: Larry Stehno on July 19, 2021, 05:06:06 PM

How do I send you a screen shot?  JPGs aren't allowed for uploads.

Title: Re: Display With Horizontal White Bars
Post by: Jerry on July 19, 2021, 05:10:08 PM

In your welcome to the Forum message, there is a link there to posting guidelines.

Sent from my mobile phone using Tapatalk

Title: Re: Display With Horizontal White Bars
Post by: Larry Stehno on July 19, 2021, 05:46:35 PM

Here is the shot of my screen with the bars from Imgur:

https://imgur.com/a/GvvoD5E

Title: Re: Display With Horizontal White Bars
Post by: Jerry on July 19, 2021, 08:20:56 PM

I've seen that condition with faulty cabling, can you try another cable or connection type (HDMI, VGA or DVI).

Sent from my mobile phone using Tapatalk

Title: Re: Display With Horizontal White Bars
Post by: Larry Stehno on July 20, 2021, 11:55:47 AM

This is an All-In-One PC so there are no external video cable connections.  This same problem shows up on two different PCs of the same model so it is unlikely to be a connection problem and is an inherent system problem with this model.  What about the video driver? How do I either roll it back to an earlier version or find one developed for Linux?  Thanks,
Planorez

Title: Re: Display With Horizontal White Bars
Post by: trinidad on July 20, 2021, 03:16:07 PM

Experiment with your screen resolution. White bars are from mismatched horiz/vert combinations. When your find one that works then you can change it to stay preferred from the grub console.

TC

Title: Re: Display With Horizontal White Bars
Post by: Larry Stehno on July 20, 2021, 04:46:43 PM

I went through all the alternative resolutions and none fixed the problem.  Thanks for the suggestion.
Planorez

Title: Re: Display With Horizontal White Bars
Post by: Jerry on July 20, 2021, 05:29:21 PM

What is the output of:

Code: [Select]

inxi -G

Title: Re: Display With Horizontal White Bars
Post by: Larry Stehno on July 20, 2021, 09:32:48 PM

Here is the video data for my PC

https://imgur.com/LdQ0Ln8

Title: Re: Display With Horizontal White Bars
Post by: trinidad on July 21, 2021, 12:12:37 PM

Known buggy hardware and no bugfix.
Run: lscpu
Doubt that CPU is Sandybridge which would mean driver is mismatched.
Could try though risky to change refresh rate to 75mghz. 16/9 is correct.

TC

Title: Re: Display With Horizontal White Bars
Post by: trinidad on July 22, 2021, 02:00:17 PM

Sorry for not helping much. I used to have a lot of Sandybridge stuff around the shop and the buggy stuff was HP with lower end CPUs and less than 4G of RAM. I think the monitors were LED backlit not LCD. With Ubuntu 16.xx the Dells with better CPUs would tell you in the settings (gnome) details section: Intel Sandybridge Desktop and they were the ones that had no trouble with the kernel and GPU. HP will just tell you 5ms as far as refresh rate because extra fb stuff is just wasted and not displayed anyway on LED backlit stuff. Anyway 60mghz is default. The lower end CPUs bottle necked the Sandybridge graphics anyway.

Anyway you may want to try out some other display settings.
https://linuxconfig.org/how-to-configure-your-monitors-with-xrandr-in-linux

TC