As far as I understand it has time racing condition between intel and
radeon modules. And it may be related with vgaswitcheroo too. On
earlyer versions of ubuntu changing the waiting time and the gfx mode in
grub seemed to affect the bug somehow. Some combination of that even
maked it disappear
Switched to 12.04. Bug seems to be gone.
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https://bugs.launchpad.net/bugs/727620
Title:
[Radeon HD 5650 and 5470] Kernel BUG during recovery boot and in
normal
The bug is back now for me (( The thing I have done before to make it gone -
pass nosplash instead of quiet splash in grub and enable option
GRUB_TERMINAL=console and GRUB_GFXMODE=1024x768
Now i have reverted these options - and the bug is back for me on Natty
2.6.38-10-generic.
So it seems
No, the later fix is not working anymore. Now blacklisting radeon to
modprobe it manually when switching.
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Title:
[Radeon
For now, my bug is completely gone. But it triggers Bug #571573 (tty
loss on intel driver). The radeon and intel drivers now manage to boot
correctly, however, the TTYs are gone until I switch off intel card (to
radeon) and then turn it back on.
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No, this bug is back ( This workaround works no more.
I have to switch card to radeon and then to intel using vgaswitcheroo and this
brings the TTYs online.
It seems that something is wrong with KMS and/or vgaswitcheroo.
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Same problem here, ACER aspire 3820TG, intel i915 card, natty
2.6.38-9-generic.
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https://bugs.launchpad.net/bugs/557635
Title:
[gm45] Intel GMA X4500HD - LCD
Got it fixed by adding acpi_osi=Linux to grub cmdline.
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Title:
[gm45] Intel GMA X4500HD - LCD Brightness Control no
Hmm. The tty is back if I switch with vgaswicheroo to another card, and
then switch back.
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https://bugs.launchpad.net/bugs/575255
Title:
[gm45] unable to
I am affected by this bug in natty. Strange thing: after I press ctrl+alt+f1
the cursor disappears, but i can blindly type in login, password, and some
commands. They are executed, I can even stop gdm ))
It seems that the intel driver can not switch video mode.
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No, it still exist on 2.6.38-9-generic when power cable is unplugged (
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Title:
[Radeon HD 5650 and 5470] Kernel BUG during
Well, as far as I understood now, it is somehow related to cable plug,
but not all the times. Maybe it affects module load or something.
Here is a peace of syslog I have captured before by tailing its output to file
before everything hung on kernel 2.6.38-8.
I will try to use fwts soon.
**
Well, after update from xorg-edgers ppa and some messings with initramfs
(tried to put radeon module before intel, but later reverted it) the bug
seems to be happening very rarely, but at random :( As drawback, my
ttys are gone again. But it is another bug of intel driver. And here is
my DSDT.dsl
@Seth Forshee to get things clear about the cable. I never tried to
plug/unplug cable in the boot process. I have only booted with cable
already plugged in or unplugged.
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The bug never happens after the successfull boot. Even when I switch
cards with vgaswitcheroo.
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Title:
[Radeon HD 5650 and
@Seth Forshee maybe it is because my ATI card is switched off by script via
vgaswitcheroo after boot?
There are two SSDT.dsl files, attaching them.
** Attachment added: SSDT0.dsl
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/727620/+attachment/2115217/+files/SSDT0.dsl
Second one
** Attachment added: SSDT1.dsl
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/727620/+attachment/2115218/+files/SSDT1.dsl
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I have found the way to work around this bug without messing up the
driver. The kernel options in grub have to be changed from quiet
splash to nosplash. Yay! My TTYs are back )
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can confirm this bug on hybrid radeon 6550 and intel card on acer aspire 3820TG
natty kernel 2.6.38-8-generic.
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Title:
issue seems to be gone with kernel 2.6.38-9-generic from proposed.
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Title:
[Radeon HD 5650 and 5470] Kernel BUG during
Can confirm this bug on natty (kernel 2.6.38-8-generic). It appears on
notebook with switchable graphics. ATI card is not affected. Intel card
is affected.
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The only way to workaround this bug is to add nomodeset option for
grub menu. But this cripples the intel driver.
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https://bugs.launchpad.net/bugs/571573
Title:
installing edgers ppa does change nothing :( This problem was not
present in maverick.
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https://bugs.launchpad.net/bugs/571573
Title:
[arrandale] no tty
*** This bug is a duplicate of bug 129910 ***
https://bugs.launchpad.net/bugs/129910
By some way my tty's got disabled at ubuntu 9.10.
The only way to get them work is: sudo start tty1 tty6
sudo initctl list shows all tty are stop/waiting. Why?
Using nvidia graphic card.
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