[mythtv-users] Video output size changed

[Mike Bibbings]

On 15/01/18 15:13, Jim wrote:
> On 1/15/2018 9:15 AM, Mike Bibbings wrote:
>> On 15/01/18 13:48, Jim wrote:
>>> I rebooted my BE/FE Saturday and when it came back up the picture 
>>> was no longer full screen. It's not quite letterboxed, it's 
>>> somewhere between full screen and letterboxed. It's got about a 2" 
>>> black band across the top and bottom and about a 1" band down both 
>>> sides. It's connected via HDMI to a 44" Samsung, as it has been for 
>>> a couple of years.
>>> I don't think it's a myth issue as the toolbar on the desktop is the 
>>> same way. It stops about an inch from the screen edges. It seems to 
>>> not know the tv/screen size anymore.
>>> Ignoring the fact that it is not using the full screen the aspect 
>>> ratio is wrong, things are now squished top to bottom.
>>>
>>> I don't understand what could have changed. This has been working 
>>> fine since I updated to v29 on Jan 1st. And on v0.28 for several 
>>> months before that. I have not made any changes. I did try rebooting 
>>> several times and now it is always coming back up like this.
>>>
>>> Here is version info fixes/29 [v29.0-71-g339b08e]
>>>
>>> Here is a frontend log
>>> https://pastebin.com/ZRX5FJzN
>>> There is a lot about waiting for video buffers and VDPAU errors.
>>>
>>> and here is a backend log
>>> https://pastebin.com/PXyyUKZ1
>>> This log shows some errors about not being able to find channel 4_1. 
>>> I know that issue and I'll fix that.
>>>
>>> This pc has an NVIDIA card in it and I'm wondering if the driver has 
>>> gotten corrupted. Not sure what to do about that.
>>>
>>> Any suggestions?
>>>
>> What is the NVIDIA card and what is your linux kernel version ?
>>
>> I recently had a problem on Xubuntu 16.04 LTS with an older NVIDIA 
>> (Geforce 210) card  caused by the the latest update 
>> (Meltdown/Spectre)  to  kernel 4.13.0-26-generic #29~16.04.2-Ubuntu 
>> SMP Tue Jan 9 22:00:44 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
>>  which tries to install  NVIDIA driver 384.111, the NVIDIA install 
>> crashes.  Previously I was using NVIDIA 340 driver.
>>
>> Mike
>>
> That could be the problem. It is 16.04 (updated sometime in Dec) and 
> it is an older system going on 9  years old now.
> The video card is ASUS GeForce 8400 GS DirectX 10 EN8400GS 
> SILENT/HTP/512M 512MB 64-Bit GDDR2 PCI Express x16 HDCP Ready
> https://www.newegg.com/Product/Product.aspx?Item=N82E16814121235
> This is from dmesg - Linux version 4.13.0-26-generic 
> (buildd at lgw01-amd64-031) (gcc version 5.4.0 20160609 (Ubuntu 
> 5.4.0-6ubuntu1~16.04.5)) #29~16.04.2-Ubuntu SMP Tue Jan 9 22:00:44 UTC 
> 2018 (Ubuntu 4.13.0-26.29~16.04.2-generic 4.13.13)
>
> How can I tell what driver it used to use and what driver it is using 
> now?
>
 From your pastebin you were using Nvidia 340.102, the 340 series is the 
last to support your graphics card - it requires the Nvidia legacy 
driver (later drivers do not support the graphics card).

The only solution I have found is to use the ubuntu graphics ppa (which 
has 340.104 driver which has been patched to support latest kernels)  
from https://launchpad.net/~graphics-drivers/+archive/ubuntu/ppa

So from a terminal do :

sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt update
sudo apt upgrade followed by a reboot.

Note Nvidia driver installation can be a bit problematic at times, if 
this happens, I found the following usually fixes the problem.

1. Purge the Nvidia drivers (sudo apt remove nvidia* --purge)

2. Reboot

3. Reinstall the Nvidia drivers , nvidia-340 in your case (sudo apt 
install nvidia-340)

4. Reboot

Mike





-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mythtv.org/pipermail/mythtv-users/attachments/20180115/6cabf0df/attachment.html>