Re: Kernelshark v2 all-black plots area

[Yordan Karadzhov <y.karadz@gmail.com>]

Hi Solomon,

There are few things you can do.
The way KernelShark build finds the font file is by running the following command in a shell:

fc-list FreeSans |grep FreeSans.ttf | cut -d':' -f 1 -z

So run the same command in a terminal and try to figure out why it fails.
If it fails because the 'FreeSans.ttf' does not exist, you can manually provide a path to some other font file to be used.

cd kernel-shark/build
./cmake_clean.sh
cmake -DTT_FONT_FILE=/path/to/some/font/YourFont.ttf ..

Please let me know if this works.
Thanks!
Yordan


On 20.04.22 г. 3:38 ч., Solomon Tan wrote:
> On Tue, Feb 09, 2021 at 03:06:14PM +0200, Yordan Karadzhov (VMware) wrote:
> 
> Hi Yordan!
> 
> I have the same issue of an all-black plots area.
> 
>> Ciao Dario,
>>
>> There is a bug in one of the patches from the last patch-set I sent. This
>> bug was reported by Tzvetomir. My guess is that you are hitting the same
>> issue. If this is the case you must also have an error message saying
>> "Unable to find FreeSans font".
> 
> I have the same error message. I tried installing the `gnu-free-fonts`
> package on Arch, but it does not get rid of the error.
>>
>> You can manually do the fix suggested by Tzvetomir (see his reply to [PATCH
>> 15/24] kernel-shark: Update KsDualMarker and KsGLWidget) or just get a
>> corrected (rebased) version of the code from
>> https://github.com/yordan-karadzhov/kernel-shark-v2.beta
> 
> I tried installing from your github repo, but the same error still
> shows. I have all other dependencies installed. FreeSans is the only
> complaint from the cmake .. command. Is there another potential fix I
> could try?
> 
>>
>> Please let me know if this fixes your issue.
>> Thank you very much for testing and reporting!
>>
>> Best
>> Yordan
> 
> Thank you!
> Cheers,
> Solomon