[mythtv-users] Video output size changed

Jim lists at morton.hrcoxmail.com
Mon Jan 15 19:26:45 UTC 2018


On 1/15/2018 11:04 AM, Mike Bibbings wrote:
> 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
>
>
>
>
>
Mike,

Thanks a million! That solved it. I now have a full screen picture again.

Question... Is it possible for it to do that again and is there a way 
for me to freeze it at that video driver so it can't?

-- 
Jim Morton


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