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I'm having a nightmare with V40z under RHEL 4 update 2!

Dear All,

i have noticed that most of you trying to be very helpfull, i appreciated that really.

I have to work with sun V40z in my company, RHEL 4 update 2 has to be installed in that machine. Problem: Installing RHEL AS V4 Update 2 on V40z results in very slow 2D graphics (e.g. just moving a window around). One CPU (of 4) is permanently around 50-100% as the window are moved. A linux 'top' command clearly shows that it is 'X' (windows) that is taking all the CPU - so we suspect a graphic driver problem.

i have tried using the RHEL drivers supplied by Sun Microsystems with the V40z, however these will not install on RHEL update 2, the driver installation recognises update 2 and reports that the drivers are only supported on Update 1.

I am not too sure where the problem is! is it only drivers!? or i did something wrong?i have spent the whole last week trying to solve this problem searching in different froums and trying countless hints!!

i have tried to switch the graphic drivers to VESA generic instead of Trident Blade 3D but that didnt solve the problem, it actually made it worst!

any help would be appreciated!

regards

[1192 byte] By [mossymossa] at [2007-11-27 10:03:29]

«« how to stop thread A from thread B using a button
»» Picking some numbers randomly from a pool of integers :-)

# 1

yeah! i forget to mentionwe must run Redhat EL 4 update 2 due to the requirments of the project! : ,(

mossymossa at 2007-7-13 0:38:27 >

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# 2

Hi,

I believe we see this same behaviour in Linux if we allow the screensaver (random by default) to run in a background VNC session for example.

Have you tried setting the screensaver to "blank" in your Window Manager of choice for all accounts you use under X and rebooting the server to eliminate any old session?

yangpata at 2007-7-13 0:38:27 >

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# 3

thank you yangpat for your reply, but that didnt work, i have disabled screensevers from all the other accounts but it didnt work!:,(

mossymossa at 2007-7-13 0:38:27 >

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# 4

any help would be much appreciated!

mossymossa at 2007-7-13 0:38:27 >

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# 5

I have several v40z's running RHEL 3, not 4, but I'll take a stab at it.

RHEL 4 is a supported OS according to the SUN compatibility matrix, so that isn't an issue.

First, I'll assume that you loaded the full RHEL4 distro, and didn't leave anything out like KDE of GNOME or other desktop packages.

Then, what typically causes poor graphics performance is a driver that is unable to address the screen properly, and uses lots of CPU to 'render' in a next best fit manner graphics instructions that it cannot do natively. This is typically done when a graphics driver for that specific graphics chipset is not found and a default driver is used just to get the system going. The logic is like this: I'll try x, no, doesn't work, try y, no, doesn't work, take the default z which is a really barebones graphics driver that does straight VGA.

I would get the specification for the graphics card on the v40z. Say it is an Nvidia card. Then I'd go the the nvidia site and download the latest linux driver for that card, and load it on top of the RHEL supplied driver.

truly64a at 2007-7-13 0:38:27 >

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