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Since I upgraded to 15.04 everything is horribly slow, with Xorg using 100% CPU. Can't find any reason in any log file. I have 

   lspci
   00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
   00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
   00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
   00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
   00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05)
   00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
   00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05)
   00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
   00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5)
   00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5)
   00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #4 (rev d5)
   00:1c.6 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #7 (rev d5)
   00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05)
   00:1f.0 ISA bridge: Intel Corporation HM87 Express LPC Controller (rev 05)
   00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05)
   00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
   01:00.0 3D controller: NVIDIA Corporation GK208M [GeForce GT 740M] (rev a1)
   07:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8188EE Wireless Network Adapter (rev 01)
   09:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5227 PCI Express Card Reader (rev 01)
   0f:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0c)

Anyone sees the same? And found a fix? Thanks

Pilot6
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user2306488
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2 Answers2

-1

Run 

glxinfo |grep string

If you get this

OpenGL vendor string: VMware, Inc.

Then, it looks like I had exactly the same problem: the intel cpu-integrated graphics didn't use intel drivers. I fixed it with the following:

  1. Be sure you have installed intel proprietary drivers. In case you have the drivers installed - jump to step 2, in case you don't, go to https://01.org/linuxgraphics/downloads and download "Graphics Installer 1.0.8 for Ubuntu* 14.10" (they currently don't have the version for 15.04, but this version also works fine), install it with

    dpkg -i name_of_the_downloaded_file.deb

    The installer of the driver itself won't work, because it checks for Ubuntu version in /etc/lsb-release, so save your original /etc/lsb-release somewhere and change the file to this:

    DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.10
DISTRIB_CODENAME=utopic
DISTRIB_DESCRIPTION="Ubuntu 14.10"

    Then run the installer:

    intel-linux-graphics-installer

    And install the driver (next, next...)

    Now, don't forget to replace back the /etc/lsb-release with your saved copy.

  2. Edit the grub config

    vim /etc/default/grub

    Find

    GRUB_CMDLINE_LINUX_DEFAULT="..."

    And remove "nomodeset" from this line, because if it's set - it will prevent the driver from loading. Save the file and run

    update-grub
reboot

    That's all. It should work fine now.

Eliah Kagan
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olegk
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  • This is a VERY bad solution. In many ways. – Pilot6 May 19 '15 at 17:48
  • Could you explain why? I know it works and there is an open bug for this without any solution... I give a working solution and you say it's bad. OK, I will delete it, no problem... Did you have this problem? Do you know the OS becomes unusable with this bug?It was my first and only post, I use this website for years to get answers and never had any activity here, so just to write the solution I registered, spent my time writing it instead of writing code and you say it's bad. Not good experience, really. – olegk May 19 '15 at 17:56
  • 1. OP has hybrid graphics with Nvidia. 2. It is not good to change release. 3. Intel installer is not good to install. And many more. Everything is wrong. – Pilot6 May 19 '15 at 18:02
  • 1. I have hybrid graphics too. With Nvidia. I'm not blind and I see what the OP has. 2. It's a way to install proprietary graphics driver from Intel (until they release the new version for 15.04). 3. I use Intel drivers for a long time and they work fine. I don't see any reason not to use Intel original proprietary driver. – olegk May 19 '15 at 18:03
  • There is no Intel 'proprietary' driver. They are all open source. I won't argue. – Pilot6 May 19 '15 at 18:09
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    OK. You win. Here's my new answer: the OP should wait half a year until 1) Intel releases driver for 15.04; OR 2) Ubuntu releases update that fixes the bug. The OP waited for a month already and probably using some other distribution already anyway, because it's unusable with xorg using 100% of CPU. – olegk May 19 '15 at 18:16
  • @olegk: I also have the NVidia hybrid crap and Ubuntu still hasn't fixed the bug. When Xorg and compiz start eating up to 80% of CPU, nothing but a restart solves it. – Dan Dascalescu Feb 09 '18 at 10:06
  • I also have the NVidia hybrid crap and Ubuntu still hasn't fixed the bug. When Xorg and compiz start eating up to 80% of CPU, nothing but a restart solves it. In the meantime "Graphics Installer XXX for Ubuntu*" was changed to "xf86-video-intel". – Dan Dascalescu Feb 09 '18 at 10:16
-2

Try this solution, it's great, I could solve my problem with this https://bugs.launchpad.net/bugs/472406,, then you must update the kernel and to do in terminal sudo update-grub and reboot,, then you have a PC without problems

Rommel Castro
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  • Whilst this may theoretically answer the question, [it would be preferable](http://meta.stackoverflow.com/q/8259) to include the essential parts of the answer here, and provide the link for reference. – guntbert Aug 09 '15 at 20:07