View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0005132||Kali Linux||Feature Requests||public||2018-11-30 07:52||2021-07-07 15:17|
|Priority||normal||Severity||minor||Reproducibility||have not tried|
|Fixed in Version||2021.2|
|Summary||0005132: Ensure Qt can use OpenGL ES drivers for hardware acceleration on arm64|
Qt offers a build time configuration between using an OpenGL stack or an OpenGL ES stack. In Debian, it uses the OpenGL stack everywhere except on armel and armhf. We would like it to use OpenGL ES on arm64 too because arm64 has many embedded/mobile boards that support only OpenGL ES (either as a hardware restriction or, more frequently, as a restriction of the (proprietary) drivers shipped by the vendor).
When Qt is built for OpenGL and when the drivers only support OpenGL ES, the user is effectively stuck with no hardware acceleration at all and the 3D rendering falls back to the CPU and it's much slower, leading to a poor desktop experience.
This request has been brought to Debian in the following bug: https://bugs.debian.org/881333
At the same time, the discussion showed that it should be not too hard to build two versions of the Qt libraries and it might be that Dmitry Shachnev will implement this. However it's quite clear that it's a poor design decision from Qt to require the user to make that choice at build time and it turns out that for Windows it's possible to make that choice at runtime:
So ideally the best outcome would be to have a similar feature for Linux and with Dmitry we have requested this to the Qt developers through a bug report and a mailing list discussion:
Dmitry started to work on this: https://salsa.debian.org/mitya57/qtbase/commits/gles/master
The package has been uploaded to Debian experimental: qtbase-opensource-src-gles but it's currently stuck in the NEW review queue.
Dmitry queried the Debian release team about updating packages to get the new dependency allowing to switch between the GL and GLES variant of Qt:
The -gles variant of Qt is now available in testing and kali but many packages still have to be rebuilt to get the new dependency:
Dmitry also mentioned that qtdeclarative5-gles still needs to be created.
The change is finished on the Debian side.
|2018-11-30 07:52||rhertzog||New Issue|
|2018-11-30 07:52||rhertzog||Assigned To||=> rhertzog|
|2018-11-30 07:54||rhertzog||Description Updated|
|2019-01-02 14:23||rhertzog||Note Added: 0010136|
|2019-01-10 15:35||rhertzog||Note Added: 0010195|
|2019-01-14 09:40||rhertzog||Note Added: 0010204|
|2019-11-29 16:23||rhertzog||Note Added: 0011489|
|2021-07-07 15:17||rhertzog||Status||assigned => resolved|
|2021-07-07 15:17||rhertzog||Resolution||open => fixed|
|2021-07-07 15:17||rhertzog||Fixed in Version||=> 2021.2|
|2021-07-07 15:17||rhertzog||Note Added: 0014899|