This bug has the best fit of the same error I get since the past few new upgrade releases. I get a ton of screen flicker especially on flash pages and the computer overall now acts like it is running slower but there is no load on the CPU an no lack of RAM issues.
So for this is the best I have managed to make an xorg.conf an a Toshiba A45-S151 with an 855GM video card. Testing with glxgears performance is still very slow but FPS is now more stable around 470FPS. Previously it would spike to 1200FPS then drop to around 300 FPS. I keep getting the same messages in Xorg.0.log (WW) intel(0): Chosen PLL clock of 66.6 Mhz more than 2% away from desired 65.0 Mhz (II) intel(0): Selecting standard 18 bit TMDS pixel format. (EE) intel(0): underrun on pipe B! (EE) intel(0): tried to update DSPARB with both planes enabled! (II) intel(0): I2C device "LVDSDDC_C:ddc2" registered at address 0xA0. (II) intel(0): I2C device "LVDSDDC_C:ddc2" removed. (EE) intel(0): underrun on pipe B! Researching this points to that this model has a second video output which is not currently being used so I am not sure it is related, so I am not too concerned with the permissions on card1 at this time. /dev/dri/ total 0 drwxr-xr-x 2 root root 80 2009-01-24 15:22 . drwxr-xr-x 15 root root 13900 2009-01-24 15:22 .. crw-rw-rw- 1 root video 226, 0 2009-01-24 15:22 card0 crw-rw---- 1 root video 226, 1 2009-01-24 15:22 card1 I also tried turning back to the older Linux kernel and there is no change. Linux joe-laptop 2.6.27-9-generic #1 SMP Thu Nov 20 21:57:00 UTC 2008 i686 GNU/Linux Xorg.99.log shows the following errors: (II) Loading sub module "ddc" (II) LoadModule: "ddc" (II) Module "ddc" already built-in f000:4169: 01 ILLEGAL EXTENDED X86 OPCODE! (II) intel(0): VESA VBE DDC not supported And also (II) Reloading /usr/lib/xorg/modules//libint10.so (II) intel(1): initializing int10 (EE) intel(1): Cannot read V_BIOS (3) Function not implemented Hope this information helps. ** Attachment added: "xorg.conf" http://launchpadlibrarian.net/21604083/xorg.conf -- [i855] laptop screen flickers https://bugs.launchpad.net/bugs/292761 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
