To begin with, thank you for your answer. Well, Acer Aspire 3003LMi has SiS M760GX graphics chipset (which I had not been able to get 3D-acceleration from from any distribution). For SiS M760GX, I use the drivers that came with SL6.2. I use the default desktop for SL6.2 (GNOME). The problem with suspend-resume is there, both with screen locking or not. Hibernation worked ok last time I checked, the problem is with suspend (to RAM) and resume. On Thu, May 3, 2012 at 6:14 PM, zxq9 <[log in to unmask]> wrote: > On 05/04/2012 12:01 AM, Stavros Filippidis wrote: >> >> I use Scientific Linux 6.2 with my laptop Acer Aspire 3003LMi and >> suspend-resume does not work for me! Laptop seems to suspend ok, but >> when resuming, the monitor displays either black screen or green lines >> that move on a black screen, the caps lock does not change the >> respective led, and sometimes a led is blinking! >> >> Could you advice me with steps for troubleshooting this? > > > This is very often related to graphics driver problems and the way they > (don't) work well with X. > > For someone to help you out you'll need to let everyone know: > 1. What graphics chipset does your laptop have? > 2. What drivers are you using (the ones that came with SL6.2, homespun or > proprietary) > 3. What desktop environment are you using? > 4. Do you have graphic accelerated screensavers running as part of the > wait-idle-suspend cycle? > 5. Do you have screen locking enabled from blank screen or suspend? > 6. Is you computer suspending or hibernating? > > With that information someone will probably stand a decent chance of helping > you out -- even if its just to say "hopeless; turn off suspension/sleep".