2011/4/21 Alex Williamson <[email protected]> > On Thu, Apr 21, 2011 at 11:18 AM, Bastien Schuhmacher > <[email protected]> wrote: > > I tested your module on my Asus N53Jf with ubuntu 10.10 and 2.6.38. > > > > It seems to be working right now, although it gets me a little confused. > > > > echoing ON and OFF impacted battery drain rate as expected, so I guess > > discrete GPU is shut down properly. > > > > Then I tried to switch to discrete. I echoed DDIS, then tried an X > restart > > with Alt+sys+K (Ctrl-Alt-Bckspc doesn't work for a reason..). > > This gave me a blank screen I could not leave. I noticed that the screen > was > > lit though. > > If you have one available, does plugging in an external monitor > trigger the display to turn on? 2.6.38 is supposed to have the vga > switcheroo client reprobe hook, but I haven't actually tested this > with that kernel yet. You might boot to the default ubuntu 10.10 > kernel and do the install and see if things work better. That would > be a more similar vintage to the fedora 14 kernel I'm using for > testing. >
I'll try that at home, but that will be this week end. > > On reboot, I had a blank screen between GRUB and GDM, so I assume I was > on > > discrete. This time the screen was not even lit, it was completely off. > > The laptop will typically reset back to IGD on reboot. At least I've > never seen mine come up with discrete graphics unless I flip the > switch in the BIOS setup. > That's what I was expecting, but drain rates and echo OFF not having any effect made me think I was on discrete. > > > Now, what confuses me is the output of cat > > /sys/kernel/debug/vgaswitcheroo/switch wich says : > > 0:DIS: :Off:0000:01:00.0 > > 1:IGD:+:Pwr:0000:00:02.0 > > > > But I noticed echo OFF no longer lowers battery drain. Rate stays at > ~30W, > > which is a typical rate when GPU is ON. > > Is the cat command unreliable ? Or do I misunderstand it? > > How did you setup the modules, loading by hand, or automatically via > initramfs? Seems like maybe they're not getting loaded right on the > reboot. > I used make install-ubuntu. I think my problem is I installed the module on 2.6.35 and forgot to reinstall after updating to 2.6.38. I realize I could not turn off discrete after my update. My mistake.. I'll try reinstalling tomorow. > > > I don't really have use of the discrete card, but the good news for me is > I > > don't get frozen on shutdown anymore with the xorg cold bug. May be > related > > to the new kernel tough, as I was running under 2.6.35 and updated to > test > > this module. > > I'm not familiar with the "xorg cold bug", but I do get freezes on > shutdown sometimes with my system. I was working on an init script > that would power the discrete graphics on early in shutdown to see it > that would help. Thanks, > > Alex >
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