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PC specification:

  • OS:Ubuntu 20.04 LTS
  • Processor: Intel i3
  • ram: 4 gb
  • 1 Tb Hdd

i have installed three version of scilab 5.0 ,6.0.2 ,6.1 by following the procedure below:

  1. download tar files from official website
  2. untar them
  3. type ./bin/scilab

Inn these three scilab version , i get the same problem that graphic window appear which is completely blank , there is no plot now how i resolve this

my PC graphic : Mesa Intel® HD Graphics 620 (KBL GT2)

(base) vivek@vs~$ lspci | grep -Ei "VGA|3D|Video" 
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02) 
(base) vivek@vs~$ glxinfo | grep -i vendor 
Command 'glxinfo' not found, but can be installed with: sudo apt install mesa-utils 
(base) vivek@vs~$ lsmod | grep drm, 
(base) vivek@vs~$ vainfo 
Command 'vainfo' not found, but can be installed with: sudo apt install vainfo 

(base) vivek@vs:~$ glxinfo | grep -i vendor 
## server glx vendor string: SGI client glx vendor string: Mesa Project and SGI Vendor: Intel (0x8086) OpenGL vendor string: Intel

(base) vivek@vs:~$ lsmod | grep drm 
drm_kms_helper 217088 1 
i915 cec 53248 2 drm_kms_helper,i915 
fb_sys_fops 16384 1 drm_kms_helper 
syscopyarea 16384 1 drm_kms_helper 
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper 
drm 552960 11 drm_kms_helper,i915

(base) vivek@vs:~$ vainfo
libva info: VA-API version 1.7.0 
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_7 
libva info: va_openDriver() returns 0 
vainfo: VA-API version: 1.7 (libva 2.6.0) 
vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 20.1.1 () 
vainfo: Supported profile and entrypoints VAProfileMPEG2Simple : VAEntrypointVLD
VAProfileMPEG2Main : VAEntrypointVLD 
VAProfileH264Main : VAEntrypointVLD 
VAProfileH264Main : VAEntrypointEncSliceLP 
VAProfileH264High : VAEntrypointVLD 
VAProfileH264High : VAEntrypointEncSliceLP 
VAProfileJPEGBaseline : VAEntrypointVLD 
VAProfileJPEGBaseline : VAEntrypointEncPicture
VAProfileH264ConstrainedBaseline: VAEntrypointVLD
VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP VAProfileVP8Version0_3 : VAEntrypointVLD 
VAProfileHEVCMain : VAEntrypointVLD 
VAProfileHEVCMain10 : VAEntrypointVLD 
VAProfileVP9Profile0 : VAEntrypointVLD 
VAProfileVP9Profile2 : VAEntrypointVLD
N0rbert
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Vivek Sharma
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    Couple of things fist do not use all caps like that. Second they have their own support https://www.scilab.org/services/user-support – David Apr 25 '21 at 06:24
  • do you think this is relevant – Vivek Sharma Apr 25 '21 at 06:30
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    Please [edit] your question to remove the unnecessary capitalisation which hurts my eyes and make it difficult for people to read. If you left the `cap lock` on by mistake, you can use on online tool like https://convertcase.net/ – graham Apr 25 '21 at 06:51
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    Does this answer your question? [How to get Scilab 6.1.0 working on Ubuntu 20.04 LTS?](https://askubuntu.com/questions/1260149/how-to-get-scilab-6-1-0-working-on-ubuntu-20-04-lts). Alternatively, use [GNU Octave](http://octave.org). It has excellent syntax compalibility with Matlab and Scilab. `sudo apt install octave` – Archisman Panigrahi Apr 25 '21 at 06:54
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    Please retry with `LIBGL_ALWAYS_SOFTWARE=1 ./bin/scilab` . What is your graphics card? Please show the output of `lspci | grep -Ei "VGA|3D|Video"` , `glxinfo | grep -i vendor` , `lsmod | grep drm`, `vainfo` . Do you use real hardware or VM? Have you tried running Scilab 5.2? – N0rbert Apr 25 '21 at 07:36
  • N0rbert : thanks man – Vivek Sharma Apr 25 '21 at 08:59
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    LIBGL_ALWAYS_SOFTWARE=1 ./bin/scilab this is really help , now plots appear on graphic window – Vivek Sharma Apr 25 '21 at 09:00
  • my PC graphic : Mesa Intel® HD Graphics 620 (KBL GT2) – Vivek Sharma Apr 25 '21 at 09:01
  • Post the output to the question for remaining commands. [Edit it](https://askubuntu.com/posts/1333764/edit). – N0rbert Apr 25 '21 at 09:02
  • (base) vivek@vs~$ lspci | grep -Ei "VGA|3D|Video" ## 00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02) __(base) vivek@vs~$ glxinfo | grep -i vendor ## Command 'glxinfo' not found, but can be installed with: sudo apt install mesa-utils __(base) vivek@vs~$ lsmod | grep drm, __(base) vivek@vs~$ vainfo ## Command 'vainfo' not found, but can be installed with: sudo apt install vainfo – Vivek Sharma Apr 25 '21 at 09:08
  • Please install both tools with `sudo apt install mesa-utils vainfo` and then run `glxinfo | grep -i vendor` , `lsmod | grep drm` and `vainfo` again. – N0rbert Apr 25 '21 at 09:10
  • just give me 2 minute – Vivek Sharma Apr 25 '21 at 09:11
  • (base) vivek@vs:~$ glxinfo | grep -i vendor ## server glx vendor string: SGI client glx vendor string: Mesa Project and SGI Vendor: Intel (0x8086) OpenGL vendor string: Intel – Vivek Sharma Apr 25 '21 at 09:16
  • ______(base) vivek@vs:~$ lsmod | grep drm ######## drm_kms_helper 217088 1 i915 cec 53248 2 drm_kms_helper,i915 fb_sys_fops 16384 1 drm_kms_helper syscopyarea 16384 1 drm_kms_helper sysfillrect 16384 1 drm_kms_helper sysimgblt 16384 1 drm_kms_helper drm 552960 11 drm_kms_helper,i915 – Vivek Sharma Apr 25 '21 at 09:16
  • ___(base) vivek@vs:~$ vainfo ###### libva info: VA-API version 1.7.0 libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_7 libva info: va_openDriver() returns 0 vainfo: VA-API version: 1.7 (libva 2.6.0) vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 20.1.1 () vainfo: Supported profile and entrypoints VAProfileMPEG2Simple : VAEntrypointVLD – Vivek Sharma Apr 25 '21 at 09:17
  • VAProfileMPEG2Main : VAEntrypointVLD VAProfileH264Main : VAEntrypointVLD VAProfileH264Main : VAEntrypointEncSliceLP VAProfileH264High : VAEntrypointVLD VAProfileH264High : VAEntrypointEncSliceLP VAProfileJPEGBaseline : VAEntrypointVLD VAProfileJPEGBaseline : VAEntrypointEncPicture VAProfileH264ConstrainedBaseline: VAEntrypointVLD – Vivek Sharma Apr 25 '21 at 09:17
  • VAProfileH264ConstrainedBaseline: VAEntrypointEncSliceLP VAProfileVP8Version0_3 : VAEntrypointVLD VAProfileHEVCMain : VAEntrypointVLD VAProfileHEVCMain10 : VAEntrypointVLD VAProfileVP9Profile0 : VAEntrypointVLD VAProfileVP9Profile2 : VAEntrypointVLD – Vivek Sharma Apr 25 '21 at 09:18
  • I would recommend to install the `i965-va-driver` package, then reboot and retry running Scilab. – N0rbert Apr 25 '21 at 09:28
  • i965-va-driver is already the newest version (2.4.0-0ubuntu1). now restart – Vivek Sharma Apr 25 '21 at 09:32

3 Answers3

3

As temporary solution you can force software video rendering by running Scilab with:

LIBGL_ALWAYS_SOFTWARE=1 ./bin/scilab
N0rbert
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0

Changing the mesa drivers to this worked for me

## mesa drivers to correct plot issues with scilab 6x
# See --> https://www.linuxcapable.com/install-upgrade-mesa-drivers-radeon-nvidia-on-ubuntu-20-04-lts/
RUN add-apt-repository ppa:kisak/kisak-mesa -y
RUN apt update
RUN apt upgrade -y
int64
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using the environment variable MESA_GL_VERSION_OVERRIDE=2.1 solved this problem for me at least, in Manjaro 2023-06-28.

Felipe Lorenzzon
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