On Fri, Mar 1, 2013 at 2:25 PM, Matthias Brugger <[email protected]> wrote: > Hi Andreas, > > 2013/2/28 Andreas Müller <[email protected]>: >> Hi, >> >> I am preparing 3.8 mainline for gumstix overo and have the following >> issue: waking Monitor connected by HDMI from power save makes Monitor >> complain for unsupported frequency and console says: >> >> | omapdss APPLY error: FIFO UNDERFLOW on gfx, disabling the overlay >> >> Is this a known issue? > > I'm not sure if it's the same issue, but you might give it a shot. > The problem is, that when changing the CPU frequency in OMAP3530, the > frequency of L3 is changed. This frequency is used in DSS. > The result is a fifo underflow on gfx. > > First check, if you use some dynamic cpufreq governor, which might be > changing the frequency. > A workaround (although not very nice) is to set fixed l3_main values > in mach-omap2/opp3xxx_data.c > > Best regards, > Matthias > I have gouvernor 'performance' selected which AFAIK keeps frequency at maximum. Some more details in another mail which I already prepared.
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