Bug 58181
Summary: | [gma500] Maximum screen brightness capped at 80 under gma500 | ||
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Product: | Drivers | Reporter: | Bruno Dias (bruno.r.dias) |
Component: | Video(DRI - Intel) | Assignee: | Patrik Jakobsson (patrik.r.jakobsson) |
Status: | NEW --- | ||
Severity: | low | CC: | bruno.r.dias, patrik.r.jakobsson, szg00000 |
Priority: | P3 | ||
Hardware: | All | ||
OS: | Linux | ||
Kernel Version: | 3.9.2 | Subsystem: | |
Regression: | No | Bisected commit-id: |
Description
Bruno Dias
2013-05-15 06:44:53 UTC
Hi Bruno Since changing screen brightness now "works" it has made other problems visible. This is something I'm gonna look into. I also have issues with setting the backlight from things like Unity and getting the wrong level after DPMS off/on and after suspend/resume. I'll get back to you when I've had a chance to look at it. Thanks Patrik Thanks for the response, Patrik To keep you up to date - I am now on kernel version 3.9.4 and this problem persists, and I've also been noticing brightness levels being wrong after suspend/resume. I'm curious about you mentioning Unity - have you been able to get Unity to a usable state under the gma500_gfx driver at all? Anything that leans heavily on OpenGL acceleration (Gnome shell 3 and Cinnamon for example) is unusably slow for me with this driver. Thanks again, Bruno As for Unity, it's totally useless for me as well, but I include it in my testings. I almost have a working DDX with EXA so hopefully there will be the possibility for 2D accelerated X in 3.11 or 3.12. It might not be enough for compositing WM's but will help LXDE and friends. FYI, if the hotkeys work through acpi, they respect the brightness levels from BIOS. This means there's a fixed set of levels, the lowest of which may not be 0%, and the highest may not be 100%. Disclaimer: I don't know how any of this works in gma500. Then that is probably the reason for the 80% cap. It looks to me that the brightness is set twice (BIOS and driver) so that could be the problem for the other issues that I'm getting. Still on the todo-list though. |