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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https://bugs.launchpad.net/bugs/1393085
Title:
** 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
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
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
BTW, you can also click on This bug also affects me to give it more
heat/visibility.
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Title:
Performance
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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