X crashes when trying to use LCD brightness buttons on Thinkpad X60

Bug #95937 reported by thomerz
12
Affects Status Importance Assigned to Milestone
linux-source-2.6.20 (Ubuntu)
Confirmed
High
Unassigned

Bug Description

Binary package hint: linux-source-2.6.20

Hi, I don't know if this is a x.org or a kernel related bug. If i use my LCD brightness buttons (FN Keys) on my Thinkpad X60, X crashes and I have to restart it. If I blacklist the module "video" it stops X from crashing but I'm still not able to change brightness. If I don't use X, the keys seem to work. The problem is also described here: http://www.thinkwiki.org/wiki/Problem_with_LCD_brightness_buttons

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thomerz (thomas-ulz-admex) wrote :
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thomerz (thomas-ulz-admex) wrote :
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Thomas Hotz (thotz-deactivatedaccount) wrote :
Changed in linux-source-2.6.20:
assignee: nobody → ubuntu-kernel-team
status: Unconfirmed → Confirmed
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Mark Reitblatt (mark-reitblatt) wrote :

Setting as "High" importance since this is a very easy way for unsuspecting users to kill X.

Changed in linux-source-2.6.20:
importance: Undecided → High
assignee: ubuntu-kernel-team → ubuntu-kernel-acpi
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Joel Garske (joel-garske) wrote :

Hi there, i can reproduce the error.

With me its not, that X is actually crashing, according to the Xorg log, it just seems that the output routing is messed up...

I have produced 2 Xorg Log snippets: One with Xorg Log for changing from Terminal to x and back without pressing the brightness control, another one with brightness control.... seems like a problem with the output redirection.

By the way, thanks for linking the ThinkWiki link :).

May it be that there already is a hotfix?

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Joel Garske (joel-garske) wrote :
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Joel Garske (joel-garske) wrote :
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Joel Garske (joel-garske) wrote :

The differences are shown here:

1609a1610,1635
> (II) PM Event received: Capability Changed
> I830PMEvent: Capability change
> (II) I810(0): Next ACPI _DGS [0] 0x80000100
> (II) I810(0): ACPI Toggle devices 0x1
> (II) I810(0): ACPI Toggle to 0x1
> (II) I810(0): Hotkey switch to 0x800.
> (II) I810(0): Attachable device 0x80000100.
> (II) I810(0): Attachable device 0x80000410.
> (II) I810(0): Requested display devices 0x800.
> (II) I810(0): Toggle (1) 0x1
> (II) I810(0): Detected duplicate devices. Toggling (0x1)
> (II) I810(0): Detected display change operation (0x0, 0x800, 0x1).
> (II) I810(0): Clearing Clone mode
> (II) I810(0): Primary pipe is now A.
> (--) I810(0): A non-CRT device is attached to pipe A.
> No refresh rate overrides will be attempted.
> (II) I810(0): Display plane A is enabled and connected to Pipe A.
> (II) I810(0): Display plane B is disabled and connected to Pipe B.
> (II) I810(0): Enabling plane A.
> (II) I810(0): Display plane A is now enabled and connected to Pipe A.
> (II) I810(0): Display plane B is now disabled and connected to Pipe B.
> (II) I810(0): PIPEACONF is 0x80000000
> (II) I810(0): PIPEBCONF is 0x00000000
> (II) I810(0): Mode bandwidth is 47 Mpixel/s
> (II) I810(0): maxBandwidth is 1152 Mbyte/s, pipe bandwidths are 252 Mbyte/s, 0 Mbyte/s
> (WW) I810(0): Changing XVideo pipe (1 to 0).
1614c1640
< (--) I810(0): A non-CRT device is attached to pipe B.
---
> (--) I810(0): A non-CRT device is attached to pipe A.

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Joel Garske (joel-garske) wrote :

btw... brightness control is still possible using the gnome brightness control applet

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apelete (apelete) wrote :

Exactly the same problem here. Using fn keys to adjust brightness make the screen to switch off, but using gnome brightness control applet (or gnome power manager brightness sliders) work.

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Id2ndR (id2ndr) wrote :

Same problem for me on a Toshiba U200 laptop (GMA945). Gnome applet works fine, but no fn keys (however pressing fn keys several times allow me to get back the screen).

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Id2ndR (id2ndr) wrote :

Sorry, I don't see exactly the same problem because X don't crach. I just have no output on internal LCD screen.

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Id2ndR (id2ndr) wrote :

I solved my problem installing xserver-xorg-video-intel and using intel video driver instead of i810 one.

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Serge (serge-de-souza) wrote :

Looks like this is fixed according to bug #119362

Curtis Hovey (sinzui)
Changed in linux-source-2.6.20 (Ubuntu):
assignee: Registry Administrators (registry) → nobody
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