Bugzilla – Bug 50175
[regression kernel 3.4] : nouveau detects internal laptop display as "disconnected" / screen is turned off
Last modified: 2012-06-24 14:53:56 UTC
Created attachment 61914 [details]
After upgrading from kernel 3.3.6 to 3.4.0 the internal display of my laptop turns off as soon as the nouveau driver / KMS is loaded. xrandr detects the LVDS-1 connection as "disconnected" while my external HDMI display works fine. Downgrading back to 3.3.6 fixes the problem.
Note that this is NOT an Optimus laptop, the integrated Intel graphic chip is disabled.
Sony Vaio S (VPCS11C5E)
NVIDIA GeForce 310M
Intel Core i5 M520
Arch Linux x64 (testing)
Although I assume this is irrelevant since this is obviously not an X problem:
output of dmesg, lspci and xrandr are attached.
Created attachment 61915 [details]
output of "lspci -vv"
Created attachment 61916 [details]
same problem in 3.5-rc1. any more info I can provide?
Xorg log perhaps :)
Created attachment 62795 [details]
this is with xorg-server 1.12.2 / kernel 3.4.1
I'm also affected by this issue. Early during boot (probably when nouveau gets loaded) my screen gets blank/black. Observed this with both, Arch Linux and Fedora, both running on 3.4.
Serious regression, as I can remember the same kind of issue with kernels prior to 2.6.38.
Just forgot to mention: I've also got a Sony VAIO (VPCS12C5E) with a dedicated NVIDIA GeForce graphics card (310M). So probably it is something specific to Sony.
I'm happy to provide logs of any sort, if needed. Just let me know.
However I don't think that it has something to do with X, because it goes black/blank during early boot, just before any X related stuff is started.
Similar problem here, but not on a Sony laptop.
Booting with nomodeset appears to be the only way of successfully booting, but then prevents the starting of X due to "No screens found". Without nomodeset, screen goes into power savings mode (no video output), and boot does not appear to complete (at least, I can't ssh into the affected PC).
I don't think this is a hardware-specific problem, but here's a list of my PC's hardware, just in case:
Mobo: ASUS P8Z77-V PRO
Processor: Intel Core i5-3570K 3.4GHz
GFX: nVidia GeForce GTX 560 Ti
Same problem here with kernel 3.4.x on Aptosid when the nouveau driver is loading. Kernel 3.3.6 works all right.
I have a Nvidia Geforce 8800 GTS 512 graphic card.
There seems to be a working patch over at the kernel.org bug tracker (see ). Interestingly enough I was pointed at it while trying to fix another issue, so I was quite surprised that it fixes this one.
Maybe someone else could try it in order to confirm it.
I applied the patch against 3.4.2 and I can confirm that it fixes it, thanks!
It works on my vaio cw with kernel 3.5rc3 and fixes my bug https://bugzilla.kernel.org/show_bug.cgi?id=43231
Duplicate of https://bugzilla.kernel.org/show_bug.cgi?id=43168
Just to clarify - this is an ACPI issue and nouveau is the victim of it