Thanks for uploading all the ACPI related information. I have opened
this bug for linux and closed it for xorg and xserver-xorg-video-intel
(FYI: xorg is just a meta-package for people who don't know which xorg-
related package to put a bug into, and as such really makes no sense
together with xser
** Description changed:
- Binary package hint: xorg
-
I have random screen flashes in Jaunty beta, where the screen goes black
for a split second. Similar flashes appear when I play around with the
brightness applet in the gnome-panel.
To reproduce:
- 1) put brightness applet in your p
OK, I attached whatever they wanted. I will try to update the bug
description to give it in a nutshell since there is a lot of red
herrings in the thread.
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[i965] Jaunty: random screen flashes
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** Attachment added: "acpi.tar.bz"
http://launchpadlibrarian.net/24984414/acpi.tar.bz
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** Attachment added: "uname.txt"
http://launchpadlibrarian.net/24984387/uname.txt
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** Attachment added: "lspci.txt"
http://launchpadlibrarian.net/24984384/lspci.txt
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** Attachment added: "dmidecode.txt"
http://launchpadlibrarian.net/24984375/dmidecode.txt
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** Attachment added: "kern.log.0"
http://launchpadlibrarian.net/24984291/kern.log.0
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Also tried some of the other brightness levels, the numbers never cohere
or maybe I'm just missing the pattern.
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OK, I found "brightness", it doesn't list under locate. Here's the funny
output:
> xrandr --prop
Screen 0: minimum 320 x 200, current 1280 x 800, maximum 1280 x 1280
VGA disconnected (normal left inverted right x axis y axis)
LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis) 2
For sure you have a /proc/acpi directory. Do you have a video directory in
there? If so, do you have a VID directory in there? If so, a LCD0 directory in
there? If so, what files do you have there? Nothing under /proc are real files,
it's a filesystem the kernel uses to inform/communicate with u
You might think that if it's at the max (in my case 0) and you press the
hotkey "up" then it would always behave in the same way. But it doesn't:
if it comes from 1-4-5-6-7-0 it bounces but not if it comes from 7-2-0.
There must be some hidden variable. :)
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[i965] Jaunty: random screen flashes
It's clearly the max for me when Backlight is on 0, don't know. You don't have
this bouncing behavior? Maybe it's the intel video card.
As for the brightness file, I can't find it, is it a text file?
> locate brightness
/etc/acpi/video_brightnessdown.sh
/etc/acpi/video_brightnessup.sh
/etc/
Strange... Does the same happen with
/proc/acpi/video/VID/LCD0/brightness? (it goes up to max, drops down,
etc.)
Also, 0 should not be minimum, not maximum... On my computer it is
BACKLIGHT: 12 (0x000c) range: (0,15)
and the value goes from 0 (minimum) to 15 (maximum)
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[i965]
Yes, there is no difference between the hotkeys and the brightness
applet. That's why I thought it's probly not a gnome-panel issue. OK,
here's the experiment, start out with dark screen (lowest brightness)
and I keep going up in brightness:
BACKLIGHT: 1 (0x0001) range: (0,7)
now go up
Good to know that it does not add anything to Xorg.0.log. That means we
can exclude something calling xrandr as being the source of this bug.
I'm not exactly sure where it belongs, but I guess probably the kernel. Screen
brightness change goes through the ACPI interface and those bugs are filed t
you can try logging a non GNOME session, anyway as said that's probably
not a gnome-panel issue closing this task now
** Changed in: gnome-panel (Ubuntu)
Status: Incomplete => Invalid
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[i965] Jaunty: random screen flashes
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@Sebastien: actually, I don't know how to run gnome without a panel. :)
It's probably not a gnome-panel bug, it's a problem with changing screen
brightness. So that means it's an xorg bug?
@Geir: I tried a little more and I can now confirm that a random flash
(with me doing nothing on keyboard mou
could you not run gnome-panel and see if that's still an issue? it's
doubtfully a gnome-panel bug
** Changed in: gnome-panel (Ubuntu)
Importance: Undecided => Low
** Changed in: gnome-panel (Ubuntu)
Status: New => Incomplete
** Changed in: gnome-panel (Ubuntu)
Assignee: (unassigne
** Also affects: gnome-panel (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
Binary package hint: xorg
I have random screen flashes in Jaunty beta, where the screen goes black
- for a split second. The bug is sort of the same as the old (and fixed)
- Bug 91404
Interesting that the flashes appear after inactivity because it could be
related to the screensaver. As far as I know it starts dimming the
screen slowly and not all at once.
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There is actually a quick dark flash whenever I change brightness. It's
similar to the other flashes but I cannot tell 100% if it's really the
same problem.
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I tried the script and xrandr indeed increases the number of lines of
Xorg.0.log, but xrandr never caused any flashes. I couldn't yet figure
out if my random flashes change Xorg.0.log because they don't appear
that often, I'll look out for that.
But I found something else that is interesting: say
Bernhard, do the flashes add anything to Xorg.0.log? You can check by
running `while true; do wc -l /var/log/Xorg.0.log; sleep 1; done` in a
terminal (stop it with Ctrl+C). This would print the number of lines
currently in the file once a second. If the number jumps when a flash
occurs, this tells
PS: I meant, 1-2 min mouse inactivity, then I move the mouse for the
first time after that and I get the flash at exactly that time I start
moving the mouse.
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Bug 339200: it's said here that random items disappear for a couple of
seconds. This is not the case with me, nothing disappears, there is only
a split second "dark black flash" and everything resumes normally.
Bug 344554: I saw that one and also Bug 354356, but they are talking
about unplugging a
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Confirmed
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