Hi there, Well, this machine has a built-in vga (intel chipset). I can use a old ati rage xl, just in case. Any way, thanks for the tip. Cheers, Bruno -----Mensagem original----- De: centos-bounces at centos.org [mailto:centos-bounces at centos.org] Em nome de Maciej Zenczykowski Enviada: quinta-feira, 22 de Junho de 2006 21:56 Para: CentOS mailing list Assunto: RE: [CentOS] x86 uniprocessor 4GB memory (fwd) If you have an AGP video card which you aren't actually using you can try selecting the minimum possible AGP apperture (window whatever) size (possibly even disable it?). This might help. Also removing the AGP card and using a junk 1-8MB svga card will also possibly work. In my experience the linear framebuffer of video cards is by far the greatest memory hog these days. Cheers, MaZe. On Thu, 22 Jun 2006, Bruno Sousa wrote: > Hi there, > > It seems like the bios of this machine doesn't have any type of > configuration regarding the memory mapping. > I'm already using the kernel-hugemem , but the problem remains. > What else can be done? > > By the way, if the machine had more than one cpu, the problem would remain? > > Best regards, > Bruno Sousa > > -----Mensagem original----- > De: centos-bounces at centos.org [mailto:centos-bounces at centos.org] Em nome de > James Pearson > Enviada: quinta-feira, 22 de Junho de 2006 15:54 > Para: CentOS mailing list > Assunto: Re: [CentOS] x86 uniprocessor 4GB memory > > Bruno Sousa wrote: >> Hi there, >> >> I'm currently using CentOS 4.3 (Server edition) in a HP DC 5100 with the >> IntelR 915GV chipset, powered by a PIV 3.0GHZ. >> >> Now I'm facing a problem, with memory. >> >> I got myself 4GB of memory, the system bios detects it correctly, but in >> Linux can only see around 3.5gb memory. With the default kernel-smp (I use >> hyperthread) or with kernel-hugemem , I have the same results. >> >> Is there any way to workaround this issue? > > It is probably the 4Gb memory hole issue - various 'things' reserve > memory below 4GB so hiding the real memory from the OS. > > Your BIOS may have a mapping option to map some of this hidden real > memory to above 4Gb - however, you need to use a hugemem kernel to > access this memory. > > James Pearson > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > > > _______________________________________________ CentOS mailing list CentOS at centos.org http://lists.centos.org/mailman/listinfo/centos -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.394 / Virus Database: 268.9.2/373 - Release Date: 22-06-2006