[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete = Expired
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Hi, I've been using kernel 3.18.0-031800-lowlatency for a while now, and
the performance using the powersave governor seems to be much better. I
would say that problem is resolved, but the battery life isn't improved
compared to how much it lasted when the old acpi driver was used. I'll
test now
After using this for a while, I noticed after some time the performance
seems to be degraded again even when using the performance governor.
Also, I noticed the battery life is reduced significantly, even when
using the powersave governor (before it was about 3.5 hours, now is more
like 2.5
I'll try it as soon as I have some time.
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Title:
Performance degraded and video glitches with i915 after upgrade to
utopic
To manage
luca, if you remove the non-default kernel parameters does this change
anything:
acpi_backlight=vendor pcie_aspm=force i915.enable_rc6=7 i915.enable_fbc=1
i915.lvds_downclock=1
Yes, it just makes it slower (although more consistently slow). Without
those kernel options, after a reboot, it
OK, I just noticed I only have 2 CPU scaling governors now, so looking
around I bumped into this:
http://askubuntu.com/questions/544266/why-are-missing-the-frequency-
options-on-cpufreq-utils-indicator
I switched to performance (it was in powersave) and now all seems to
be working fine. It seems
This seems like a related issue
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1188647
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Title:
Performance degraded and video glitches
** Description changed:
- After upgrading from trusty to utopic, I noticed a performance
- degradation in the video performance. In particular the flash plugin
- video (like youtube) starts OK but it degrades after a couple of seconds
- when in full screen, looking as if it was doing something
luca, could you please test the latest upstream kernel available from
the very top line at the top of the page (the release names are
irrelevant for testing, and please do not test the daily folder)
following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow
additional upstream
luca, if you remove the non-default kernel parameters does this change anything:
acpi_backlight=vendor pcie_aspm=force i915.enable_rc6=7 i915.enable_fbc=1
i915.lvds_downclock=1
As well, could you please comment to why these are in use?
** Tags added: latest-bios-1.80
** Changed in:
** Package changed: xorg (Ubuntu) = xserver-xorg-video-intel (Ubuntu)
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Title:
Performance degraded and video glitches with i915 after upgrade to
I'm having similar speed issues and strange horizontal lines all over
the screen randomly... they appear for a second and disappear.
I too have gone from Trusty to Utopic.
This page had some things to try
https://wiki.archlinux.org/index.php/Intel_graphics#SNA_issues
Going to accelmode UXA
BTW, you can also click on This bug also affects me to give it more
heat/visibility.
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Title:
Performance degraded and video glitches with i915
To get rid off these 2 errors:
[ 18.669068] i915: unknown parameter 'i915_enable_rc6' ignored
[ 18.669073] i915: unknown parameter 'i915_enable_fbc' ignored
Just remove the i915_ prefix, it was removed in recent kernels. Maybe
when those two options are used again you can get results similar to
I tried booting with kernel 3.13.11.11 (AFAIK trusty uses kernel 3.13 at
least) form http://kernel.ubuntu.com/~kernel-ppa/mainline/ and the
problems are the same, the only message I don't get in the console is
*ERROR* timed out waiting for panel to power on but switching to the
console is still
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