*** This bug is a duplicate of bug 1452858 ***
https://bugs.launchpad.net/bugs/1452858
Public bug reported:
Hello,
I'm running Ubuntu on an iMac 12,2 since november 2012. From time to
time and more and more frequently the screen lit off. The only way i can
get it on is to suspend/resume. But then, it lit off soon. I suspect
some heating. Actually, the output of the cooling system is way hotter
with Ubuntu than Mac OS X.
So i would like to switch to the IGD card rather than the discrete one.
But there is no vga_switcheroo.
How to debug screen lit off ? How to detect screen heating ? How to
disable discrete card ? Is it kernel ? Xorg ? Where to search ?
Regards,
Étienne
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** This bug has been marked a duplicate of bug 1452858
Screen lit off on iMac 12,2 after a while
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https://bugs.launchpad.net/bugs/1452855
Title:
Screen lit off on iMac 12,2 after a while
Status in linux package in Ubuntu:
New
Bug description:
Hello,
I'm running Ubuntu on an iMac 12,2 since november 2012. From time to
time and more and more frequently the screen lit off. The only way i
can get it on is to suspend/resume. But then, it lit off soon. I
suspect some heating. Actually, the output of the cooling system is
way hotter with Ubuntu than Mac OS X.
So i would like to switch to the IGD card rather than the discrete
one. But there is no vga_switcheroo.
How to debug screen lit off ? How to detect screen heating ? How to
disable discrete card ? Is it kernel ? Xorg ? Where to search ?
Regards,
Étienne
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