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Screen refresh rate to slow after 11.10 upgrade - how to change

Mark Brady
Mark Brady asked
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My System info:
Memory/Ram       3.6 Gib
Processor            Intel® Core™ i7-2635QM CPU @ 2.00GHz × 8
Graphics              VESA: SEYMOUR
OS Type              32-bit
Disk                     162.5 GB

Hi

I am running 11.10 on my Macbook Pro which I installed and ran with no problems off a setup CD I downloaded. When using 11.04 there were no major problems and once I configured a few pieces of hardware things were looking and working great.

After a software upgrade to 11.10, my screen refresh rate slowed down. When windows resize (web browsers) I have to drag the window around the screen to paint over the original window size and it is very annoying.

Please help me set the refresh rate back to what it ius supposed to be (I'm not sure what that is but I am assuming that now it is way down at around 50 Hertz or there-abouts. I'm not sure how to find it. I think it should be more like around 75 Hertz or somewhere close but I don't know where to find the optimum refresh rate for this mackbook pro early 2011 model 15 inch.

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Imran SaeedIT Technical Director

Commented:
Please confirm whether your Macbook Pro is using nVidia or ATI graphics. this is most likely caused by graphics driver issue.
Mark BradyPrincipal Data Engineer
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Commented:
I think it is ATI but not 100% sure. I read your post and looked under additional drivers and it had an ATI driver ready to download so I just tried to DL and activate it but it failed. I don't know where to look for the log file so I can see what happened but I've attached a screenshot so you can see the driver it was trying to download.
IT Technical Director
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Mark BradyPrincipal Data Engineer
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Commented:
Thanks for the link. The automatic way didn't work and I'm yet to try the manual config as mentioned but I have just endured 2 whole days of nightmare city! In trying to install this driver, Ubuntu decided not to boot anymore and just got a black screen on boot. I tried loads of fixes but ended up installing another version next to my main install and backing up my files, then re-installing fresh. Problem with a fresh install of 11.10 is that they no longer support programs like Quanta Plus which I use every day for work so I have had to endure searching for a new php editor. I ended up trying "Bluefish Editor" so the dury is still out on that one. Once I do a full backup on the new system I will try the manual install of the driver as suggested because now when I boot, the screen displays a bunch of colored garbage for a few seconds then loads unity. If the monitor goes to sleep, when I wake it up it flickers quite bad for about 10 seconds so I really need to get this driver sorted. It worked perfect in 11.04 so after reading the amount of problems in 11.10 I think Ubuntu may have jumped the gun in releasing this version.
Imran SaeedIT Technical Director

Commented:
Yes I think you are right, why not just use 11.04 if you are going to do fresh install and hold back upgrading till the next ubuntu version is released.
Mark BradyPrincipal Data Engineer
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Commented:
I'm sure this link has a driver instalation that would work but after the last few days reloading tons of work files that I lost I'm not willing to take the chance of having to reinstall yet again. Thanks for your time. I will just wait it out until the next release and see what happens in that one :)

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