[R-sig-Debian] problem with `viridis` on Ubuntu 20.04

[Dirk Eddelbuettel]

On 30 April 2020 at 10:01, Dirk Eddelbuettel wrote:
| 
| On 30 April 2020 at 16:40, Samuele Carcagno wrote:
| | after some further investigation I found out that the issue was related 
| | to some calls to the `solve` function in `make.rgb`, and indeed running 
| | `example(solve)` would hang my R session. After I changed the default 
| | BLAS with:
| | 
| | sudo update-alternatives --config libblas.so.3-x86_64-linux-gnu
| | 
| | the problem disappeared. The BLAS output of `sessionInfo` now that 
| | `solve` is working is:
| | 
| | Matrix products: default
| | BLAS:   /usr/lib/x86_64-linux-gnu/blas/libblas.so.3.9.0
| | LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/liblapack.so.3
| | 
| | while before when `solve` was not working it was:
| | 
| | Matrix products: default
| | BLAS:   /usr/lib/x86_64-linux-gnu/openblas-pthread/libblas.so.3
| | LAPACK: /usr/lib/x86_64-linux-gnu/openblas-pthread/liblapack.so.3
| | 
| | so it seems the issue is with the Ubuntu package `libopenblas0-pthread` 
| | and has nothing to do with R. I don't know why openblas-pthread was the 
| | default BLAS on my system.
| 
| That is most helpful! It could potentially affect lots of other users too.
| 
| And on the aforementioned rocker/r-ubuntu:20.04 image, if upgrade to
| libopenblas-dev I get it too:
| 
|   root using d9a07e9f0e5f:/work# apt install libopenblas-dev
|   Reading package lists... Done
|   Building dependency tree       
|   Reading state information... Done
|   The following additional packages will be installed:
|     libopenblas-pthread-dev libopenblas0 libopenblas0-pthread
|   The following NEW packages will be installed:
|     libopenblas-dev libopenblas-pthread-dev libopenblas0 libopenblas0-pthread
|   0 upgraded, 4 newly installed, 0 to remove and 0 not upgraded.
|   Need to get 13.7 MB of archives.
|   After this operation, 153 MB of additional disk space will be used.
|   Do you want to continue? [Y/n] 
| 
| and then 'example(solve)' hangs at
| 
|   sh8 <- solve(h8)
| 
| Not good at all.

Same on Debian.

Dirk

-- 
http://dirk.eddelbuettel.com | @eddelbuettel | edd using debian.org